31232130120 has 64 divisors (see below), whose sum is σ = 104107104000. Its totient is φ = 8328567744.

The previous prime is 31232130107. The next prime is 31232130133. The reversal of 31232130120 is 2103123213.

31232130120 is a `hidden beast` number, since 312 + 32 + 1 + 301 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (31232130107) and next prime (31232130133).

It is a super-2 number, since 2×31232130120² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31232130093 and 31232130102.

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, 14458240 + ... + 14460399.

It is an arithmetic number, because the mean of its divisors is an integer number (1626673500).

Almost surely, 2^31232130120 is an apocalyptic number.

31232130120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31232130120 is an abundant number, since it is smaller than the sum of its proper divisors (72874973880).

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

31232130120 is a wasteful number, since it uses less digits than its factorization.

31232130120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28918659 (or 28918649 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31232130120 its reverse (2103123213), we get a palindrome (33335253333).

The spelling of 31232130120 in words is "thirty-one billion, two hundred thirty-two million, one hundred thirty thousand, one hundred twenty".