Amazon founder Jeff Bezos tops the annual Forbes lists of billionaires with an estimated net worth of $112 billion. He's followed by Bill Gates at $90 billion and Warren Buffett at $84 billion. Mark Zuckerberg is #5 with $71 billion.

Behind the numbers: Forbes says it counted a record 2,208 billionaires worth a total of $9.1 trillion, up 18% since the year before. Most billionaires are America. [The full list]