31013111120 has 160 divisors (see below), whose sum is σ = 74743751808. Its totient is φ = 11961657344.

The previous prime is 31013111089. The next prime is 31013111159. The reversal of 31013111120 is 2111131013.

It is a happy number.

It is a super-2 number, since 2×31013111120² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31013111095 and 31013111104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89374787 + ... + 89375133.

Almost surely, 2^31013111120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31013111120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37371875904).

31013111120 is an abundant number, since it is smaller than the sum of its proper divisors (43730640688).

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

31013111120 is a wasteful number, since it uses less digits than its factorization.

31013111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 31013111120 its reverse (2111131013), we get a palindrome (33124242133).

The spelling of 31013111120 in words is "thirty-one billion, thirteen million, one hundred eleven thousand, one hundred twenty".