31313110120 has 64 divisors (see below), whose sum is σ = 72658166400. Its totient is φ = 12139464960.

The previous prime is 31313110117. The next prime is 31313110139. The reversal of 31313110120 is 2101131313.

It is a junction number, because it is equal to n+sod(n) for n = 31313110094 and 31313110103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74122 + ... + 260998.

It is an arithmetic number, because the mean of its divisors is an integer number (1135283850).

Almost surely, 2^31313110120 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 31313110120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36329083200).

31313110120 is an abundant number, since it is smaller than the sum of its proper divisors (41345056280).

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

31313110120 is a wasteful number, since it uses less digits than its factorization.

31313110120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187018 (or 187014 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31313110120 its reverse (2101131313), we get a palindrome (33414241433).

The spelling of 31313110120 in words is "thirty-one billion, three hundred thirteen million, one hundred ten thousand, one hundred twenty".