1221313132012 has 12 divisors (see below), whose sum is σ = 2138538444616. Its totient is φ = 610302147840.

The previous prime is 1221313132009. The next prime is 1221313132027. The reversal of 1221313132012 is 2102313131221.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88596789 + ... + 88610572.

Almost surely, 2^{1221313132012} is an apocalyptic number.

It is an amenable number.

1221313132012 is a deficient number, since it is larger than the sum of its proper divisors (917225312604).

1221313132012 is a wasteful number, since it uses less digits than its factorization.

1221313132012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177209088 (or 177209086 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1221313132012 its reverse (2102313131221), we get a palindrome (3323626263233).

The spelling of 1221313132012 in words is "one trillion, two hundred twenty-one billion, three hundred thirteen million, one hundred thirty-two thousand, twelve".