21 Richest Billionaires In The World

19. Carlos Slim

Facebook CEO Mark Zuckerberg talks about the new Facebook email service at an announcement in San Francisco, Monday, Nov. 15, 2010. AP Photo/Paul Sakuma)
Evan Agostini/AP

Rating: $71.1 Billion

It's good to talk: which is exactly why the "Mexican Warren Buffet" has piled up a gigantic pile of riches thanks to communications companies as well as investments in real estate, airlines, media, technology, retailing, and finance.

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