31100032102120 has 16 divisors (see below), whose sum is σ = 69975072229860. Its totient is φ = 12440012840832.

The previous prime is 31100032102081. The next prime is 31100032102123. The reversal of 31100032102120 is 2120123000113.

It can be written as a sum of positive squares in 2 ways, for example, as 31073288732964 + 26743369156 = 5574342^2 + 163534^2 .

It is a super-2 number, since 2×31100032102120² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31100032102094 and 31100032102103.

It is not an unprimeable number, because it can be changed into a prime (31100032102123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388750401237 + ... + 388750401316.

Almost surely, 2^{31100032102120} is an apocalyptic number.

It is an amenable number.

31100032102120 is an abundant number, since it is smaller than the sum of its proper divisors (38875040127740).

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

31100032102120 is a wasteful number, since it uses less digits than its factorization.

31100032102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777500802564 (or 777500802560 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31100032102120 its reverse (2120123000113), we get a palindrome (33220155102233).

The spelling of 31100032102120 in words is "thirty-one trillion, one hundred billion, thirty-two million, one hundred two thousand, one hundred twenty".