31200123112 has 16 divisors (see below), whose sum is σ = 58520893860. Its totient is φ = 15594551424.

The previous prime is 31200123043. The next prime is 31200123167. The reversal of 31200123112 is 21132100213.

It can be written as a sum of positive squares in 2 ways, for example, as 26597043396 + 4603079716 = 163086^2 + 67846^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664653 + ... + 710044.

Almost surely, 2^31200123112 is an apocalyptic number.

It is an amenable number.

31200123112 is a deficient number, since it is larger than the sum of its proper divisors (27320770748).

31200123112 is a wasteful number, since it uses less digits than its factorization.

31200123112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377540 (or 1377536 counting only the distinct ones).

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

Adding to 31200123112 its reverse (21132100213), we get a palindrome (52332223325).

The spelling of 31200123112 in words is "thirty-one billion, two hundred million, one hundred twenty-three thousand, one hundred twelve".