31312031112 has 32 divisors (see below), whose sum is σ = 86977864800. Its totient is φ = 10437343632.

The previous prime is 31312031021. The next prime is 31312031123. The reversal of 31312031112 is 21113021313.

31312031112 is a `hidden beast` number, since 31 + 312 + 0 + 311 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 72481338 + ... + 72481769.

It is an arithmetic number, because the mean of its divisors is an integer number (2718058275).

Almost surely, 2^31312031112 is an apocalyptic number.

It is an amenable number.

31312031112 is an abundant number, since it is smaller than the sum of its proper divisors (55665833688).

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

31312031112 is a wasteful number, since it uses less digits than its factorization.

31312031112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144963122 (or 144963112 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31312031112 its reverse (21113021313), we get a palindrome (52425052425).

The spelling of 31312031112 in words is "thirty-one billion, three hundred twelve million, thirty-one thousand, one hundred twelve".