Adding to 1133111212 its reverse (2121113311), we get a palindrome (3254224523).
It is a happy number.
It is an unprimeable number.
Almost surely, 21133111212 is an apocalyptic number.
It is an amenable number.
1133111212 is a wasteful number, since it uses less digits than its factorization.
1133111212 is an evil number, because the sum of its binary digits is even.
The square root of 1133111212 is about 33661.7173061625. The cubic root of 1133111212 is about 1042.5354839197.
The spelling of 1133111212 in words is "one billion, one hundred thirty-three million, one hundred eleven thousand, two hundred twelve".