31100023000120 has 32 divisors (see below), whose sum is σ = 71602378539120. Its totient is φ = 12150706659840.

The previous prime is 31100023000097. The next prime is 31100023000147. The reversal of 31100023000120 is 2100032000113.

It is a super-2 number, since 2×31100023000120² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31100023000120.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9040702641 + ... + 9040706080.

Almost surely, 2^{31100023000120} is an apocalyptic number.

It is an amenable number.

31100023000120 is an abundant number, since it is smaller than the sum of its proper divisors (40502355539000).

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

31100023000120 is a wasteful number, since it uses less digits than its factorization.

31100023000120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18081408775 (or 18081408771 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31100023000120 its reverse (2100032000113), we get a palindrome (33200055000233).

The spelling of 31100023000120 in words is "thirty-one trillion, one hundred billion, twenty-three million, one hundred twenty", and thus it is an aban number.