This number is a prime.
December 21, 2012 possesses "cryptic" prime properties. The 366653-rd prime number cryptically leads to 21-12-2012. First, the 366653-rd prime number happens to be 5280503. Also, note that each leap year is divisible by four. Amazingly, four times 5280503 equals 21122012, the single full date of December 21, 2012 expressed in the day-month-year date format! [Inan]