31032100120 has 64 divisors (see below), whose sum is σ = 80081006400. Its totient is φ = 10601687040.

The previous prime is 31032100117. The next prime is 31032100139. The reversal of 31032100120 is 2100123013.

It is a self number, because there is not a number n which added to its sum of digits gives 31032100120.

It is a congruent number.

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, 118525 + ... + 275884.

It is an arithmetic number, because the mean of its divisors is an integer number (1251265725).

Almost surely, 2^31032100120 is an apocalyptic number.

It is an amenable number.

31032100120 is an abundant number, since it is smaller than the sum of its proper divisors (49048906280).

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

31032100120 is a wasteful number, since it uses less digits than its factorization.

31032100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394708 (or 394704 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31032100120 its reverse (2100123013), we get a palindrome (33132223133).

The spelling of 31032100120 in words is "thirty-one billion, thirty-two million, one hundred thousand, one hundred twenty".