31120010012 has 48 divisors (see below), whose sum is σ = 67070384640. Its totient is φ = 12303375552.

The previous prime is 31120010003. The next prime is 31120010027. The reversal of 31120010012 is 21001002113.

It is a junction number, because it is equal to n+sod(n) for n = 31120009975 and 31120010002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 562913 + ... + 615719.

It is an arithmetic number, because the mean of its divisors is an integer number (1397299680).

Almost surely, 2^31120010012 is an apocalyptic number.

It is an amenable number.

31120010012 is an abundant number, since it is smaller than the sum of its proper divisors (35950374628).

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

31120010012 is a wasteful number, since it uses less digits than its factorization.

31120010012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54450 (or 54448 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 31120010012 its reverse (21001002113), we get a palindrome (52121012125).

The spelling of 31120010012 in words is "thirty-one billion, one hundred twenty million, ten thousand, twelve".