TAIPEI - American International Group (AIG) said Tuesday it would sell its Taiwan unit for $2.15 billion as the insurance giant raised money to pay off a huge US government bail-out loan.

AIG announced that Hong Kong-based Primus Financial Holdings would take over Nan Shan, Taiwan's number two life insurer, in what observers said was the largest deal ever to take place in the island's financial sector.

"(Primus) has pledged to continue Nan Shan's commitment to its policy holders, agents, and employees, as well as to the people of Taiwan," said Robert Benmosche, AIG chief executive officer, in a statement.

After an auction that lasted several months, Primus beat several rivals for Nan Shan, including Taiwan's Chinatrust Financial Holding. The deal still requires approval from Taiwan's government.

AIG was on the brink of bankruptcy in September 2008 and only survived after the US government offered it a financial lifeline in exchange for an 80% stake in the company.

The insurer, deemed too big to be allowed to fail, now needs to repay nearly $121 billion in US taxpayer aid, according to recent data from the Government Accountability Office, an investigative arm of Congress.

Primus Financial has promised not to change Nan Shan's brand or the existing compensation and benefits packages, AIG said in the statement.

"We have the highest respect for Nan Shan's dedicated management team, agents and employees who have built the company into the prominent Taiwan institution that it is today," said Primus Chairman Robert Morse.

"We aim to develop Nan Shan into a leading Taiwan-based, pan-Asia financial services company," he told a briefing in Taipei.

Analysts pointed out the cost is only about 70% of Nan Shan's net value, which totalled 99.6 billion Taiwan dollars ($3.1 billion) in May.

"It's definitely a good bargain," said Mars Hsu, a Taipei-based analyst with Grand Cathay Securities.

Morse dismissed rumours that Chinese capital -- banned under Taiwan law -- was involved in the transaction.

"We have no (Chinese) funds in this transaction... We will state that again to the regulatory authorities," he said.

Meanwhile, Hsu said he believed the Hong Kong consortium had a bigger target behind the deal.

"I think Primus does not eye Nan Shan only. It may also look to acquire AIG's life units in South Korea, India and Hong Kong," he said.

"It could then integrate them into a big life insurer and list it on the Hong Kong or Chinese stock market."

Nan Shan was established in 1963, and now has a network of 24 branches and 450 agency offices, employing a staff of 4,000 and more than 34,000 agents.

It had a premium income of 219 billion Taiwan dollars in 2008, according to the Taiwan Insurance Institute.