Bill Gates.

You know, Bill Gates is not the richest person in the world. He is No.2 in this year 2010. No.1 man is

No.1 Carlos Slim Helu

$53.5 billion

Telecom, Mexico.

Telecom tycoon who pounced on privatization of Mexico’s national telephone company in the 1990s becomes world’s richest person for first time after coming in third place last year. Net worth up $18.5 billion in a year. Recently received regulatory approval to merge his fixed-line assets into American Movil, Latin America’s biggest mobile phone company.

No.2 Bill Gates

$53 billion

Microsoft, U.S.

Software visionary is now the world’s second-richest man. Net worth still up $13 billion in a year as Microsoft shares rose 50% in 12 months, value of investment vehicle Cascade swelled. More than 60% of fortune held outside Microsoft; investments include Four Seasons hotels, Televisa, Auto Nation. Stepped down from day-to-day duties at Microsoft in 2008 to focus on philanthropy.