31900111110012 has 24 divisors (see below), whose sum is σ = 74468358456912. Its totient is φ = 10628403817600.

The previous prime is 31900111110001. The next prime is 31900111110041. The reversal of 31900111110012 is 21001111100913.

It is a super-2 number, since 2×31900111110012² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620792289 + ... + 620843672.

It is an arithmetic number, because the mean of its divisors is an integer number (3102848269038).

Almost surely, 2^{31900111110012} is an apocalyptic number.

It is an amenable number.

31900111110012 is an abundant number, since it is smaller than the sum of its proper divisors (42568247346900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31900111110012 is a wasteful number, since it uses less digits than its factorization.

31900111110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241638109 (or 1241638107 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 21.

Adding to 31900111110012 its reverse (21001111100913), we get a palindrome (52901222210925).

The spelling of 31900111110012 in words is "thirty-one trillion, nine hundred billion, one hundred eleven million, one hundred ten thousand, twelve".