31130230120 has 128 divisors (see below), whose sum is σ = 78348695040. Its totient is φ = 11034051840.

The previous prime is 31130230111. The next prime is 31130230139. The reversal of 31130230120 is 2103203113.

It is a junction number, because it is equal to n+sod(n) for n = 31130230094 and 31130230103.

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 31 ways as a sum of consecutive naturals, for example, 11104639 + ... + 11107441.

It is an arithmetic number, because the mean of its divisors is an integer number (612099180).

Almost surely, 2^31130230120 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 31130230120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39174347520).

31130230120 is an abundant number, since it is smaller than the sum of its proper divisors (47218464920).

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

31130230120 is a wasteful number, since it uses less digits than its factorization.

31130230120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455 (or 3451 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31130230120 its reverse (2103203113), we get a palindrome (33233433233).

The spelling of 31130230120 in words is "thirty-one billion, one hundred thirty million, two hundred thirty thousand, one hundred twenty".