31105130120 has 32 divisors (see below), whose sum is σ = 70391104920. Its totient is φ = 12370129920.

The previous prime is 31105130107. The next prime is 31105130123. The reversal of 31105130120 is 2103150113.

It can be written as a sum of positive squares in 4 ways, for example, as 26369212996 + 4735917124 = 162386^2 + 68818^2 .

It is not an unprimeable number, because it can be changed into a prime (31105130123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2240561 + ... + 2254400.

Almost surely, 2^31105130120 is an apocalyptic number.

It is an amenable number.

31105130120 is an abundant number, since it is smaller than the sum of its proper divisors (39285974800).

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

31105130120 is a wasteful number, since it uses less digits than its factorization.

31105130120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4495145 (or 4495141 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

Adding to 31105130120 its reverse (2103150113), we get a palindrome (33208280233).

The spelling of 31105130120 in words is "thirty-one billion, one hundred five million, one hundred thirty thousand, one hundred twenty".