31130312012 has 6 divisors (see below), whose sum is σ = 54478046028. Its totient is φ = 15565156004.

The previous prime is 31130311997. The next prime is 31130312039. The reversal of 31130312012 is 21021303113.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3891288998 + ... + 3891289005.

It is an arithmetic number, because the mean of its divisors is an integer number (9079674338).

Almost surely, 2^31130312012 is an apocalyptic number.

It is an amenable number.

31130312012 is a deficient number, since it is larger than the sum of its proper divisors (23347734016).

31130312012 is a wasteful number, since it uses less digits than its factorization.

31130312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7782578007 (or 7782578005 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31130312012 its reverse (21021303113), we get a palindrome (52151615125).

The spelling of 31130312012 in words is "thirty-one billion, one hundred thirty million, three hundred twelve thousand, twelve".