31100131013320 has 32 divisors (see below), whose sum is σ = 69976189291320. Its totient is φ = 12439893381120.

The previous prime is 31100131013291. The next prime is 31100131013381. The reversal of 31100131013320 is 2331013100113.

It can be written as a sum of positive squares in 4 ways, for example, as 12520600094916 + 18579530918404 = 3538446^2 + 4310398^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1775961 + ... + 8084200.

Almost surely, 2^{31100131013320} is an apocalyptic number.

It is an amenable number.

31100131013320 is an abundant number, since it is smaller than the sum of its proper divisors (38876058278000).

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

31100131013320 is a wasteful number, since it uses less digits than its factorization.

31100131013320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9939025 (or 9939021 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31100131013320 its reverse (2331013100113), we get a palindrome (33431144113433).

The spelling of 31100131013320 in words is "thirty-one trillion, one hundred billion, one hundred thirty-one million, thirteen thousand, three hundred twenty".