31120013113112 has 64 divisors (see below), whose sum is σ = 72749121408000. Its totient is φ = 12124507299840.

The previous prime is 31120013113109. The next prime is 31120013113117. The reversal of 31120013113112 is 21131131002113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120013113117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48091889 + ... + 48734687.

It is an arithmetic number, because the mean of its divisors is an integer number (1136705022000).

Almost surely, 2^{31120013113112} is an apocalyptic number.

It is an amenable number.

31120013113112 is an abundant number, since it is smaller than the sum of its proper divisors (41629108294888).

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

31120013113112 is a wasteful number, since it uses less digits than its factorization.

31120013113112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721416 (or 721412 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 31120013113112 its reverse (21131131002113), we get a palindrome (52251144115225).

The spelling of 31120013113112 in words is "thirty-one trillion, one hundred twenty billion, thirteen million, one hundred thirteen thousand, one hundred twelve".