31120331110113 has 16 divisors (see below), whose sum is σ = 47424997065600. Its totient is φ = 17781718797696.

The previous prime is 31120331110109. The next prime is 31120331110117. The reversal of 31120331110113 is 31101113302113.

It is an interprime number because it is at equal distance from previous prime (31120331110109) and next prime (31120331110117).

It is not a de Polignac number, because 31120331110113 - 2² = 31120331110109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 31120331110113.

It is not an unprimeable number, because it can be changed into a prime (31120331110117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55026588 + ... + 55589261.

It is an arithmetic number, because the mean of its divisors is an integer number (2964062316600).

Almost surely, 2^{31120331110113} is an apocalyptic number.

It is an amenable number.

31120331110113 is a deficient number, since it is larger than the sum of its proper divisors (16304665955487).

31120331110113 is a wasteful number, since it uses less digits than its factorization.

31120331110113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110629256.

The product of its (nonzero) digits is 162, while the sum is 21.

Adding to 31120331110113 its reverse (31101113302113), we get a palindrome (62221444412226).

The spelling of 31120331110113 in words is "thirty-one trillion, one hundred twenty billion, three hundred thirty-one million, one hundred ten thousand, one hundred thirteen".