31311022012 has 6 divisors (see below), whose sum is σ = 54794288528. Its totient is φ = 15655511004.

The previous prime is 31311022003. The next prime is 31311022027. The reversal of 31311022012 is 21022011313.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3913877748 + ... + 3913877755.

Almost surely, 2^31311022012 is an apocalyptic number.

It is an amenable number.

31311022012 is a deficient number, since it is larger than the sum of its proper divisors (23483266516).

31311022012 is a wasteful number, since it uses less digits than its factorization.

31311022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7827755507 (or 7827755505 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31311022012 its reverse (21022011313), we get a palindrome (52333033325).

The spelling of 31311022012 in words is "thirty-one billion, three hundred eleven million, twenty-two thousand, twelve".