Tech titans represent 11 of the top 100 of the world’s wealthiest people:

• Oracle’s Larry Ellison moves up one notch to 5th, with $39.5 billion – up 41% from last year.
• Tied for 24th were the Google twins, Sergey Brin and Larry Page. That’s unchanged from the 2010 list.
• Amazon.com CEO Jeff Bezos jumps to 30th, from 43. He’s worth $18.1 billion.
• Richest non-American tech titan? Azim Premji, of Indian IT consulting firm Wipro. He’s 36th, with $16.8 billion.
• Dell founder Michael Dell slipped to 44th, from 37th, although his worth moved up by $1.1 billion to $14.6 billion.
• Dell is now just ahead of Microsoft CEO Steve Ballmer, who fell to 46th, from 33rd. He’s got $14.5 billion, same as last year.
• Just missing the top 50: Facebook founder Mark Zuckerberg. Ranked 52nd, he’s worth an estimated $13.5 billion.
• The third Microsoftie on the list is co-founder Paul Allen. He’s ranked 57th, which is down from 37th last year, although his net worth ticked up a bit to $13 billion.
• Jumping into the top 100 was Robin Li, the CEO of China-based search engine Baidu, at 95th on the list, with $9.4 billion. That’s up from $258th, and $3.5 billion, in 2010.