Why 11-11-11 is-a mathematically an amazing date - The calendar date 11/11/11 is a is a once-in-a-century occurrence, adding to a November that has been a very fun month for recreational mathematicians.
Last week, a rare eight-digit palindrome date — 11/02/2011, which reads the same frontward and backward — was found to have other mathematical qualities that made it a once-in-10,000-years date. Aziz Inan, a professor of electrical engineering at the University of Portland in Oregon, crunched the numbers and found that when the date was expressed as a number, 11,022,011, it has very special properties.
"It is the product of 7 squared times 11 cubed times 13 squared. That is impressive because those are three consecutive prime numbers. No other palindrome date up to A.D. 10,000 is like that," Inan said. "Not only that, if you write it out as 72 x 113 x 132, you'll notice that even the superscript power numbers — 232 — are a palindrome." ( singaporetrends.com )
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