31100312131 has 16 divisors (see below), whose sum is σ = 35709649920. Its totient is φ = 26532696960.

The previous prime is 31100312107. The next prime is 31100312141. The reversal of 31100312131 is 13121300113.

It is not a de Polignac number, because 31100312131 - 2⁷ = 31100312003 is a prime.

It is a super-2 number, since 2×31100312131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31100312141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4967355 + ... + 4973611.

It is an arithmetic number, because the mean of its divisors is an integer number (2231853120).

Almost surely, 2^31100312131 is an apocalyptic number.

31100312131 is a deficient number, since it is larger than the sum of its proper divisors (4609337789).

31100312131 is a wasteful number, since it uses less digits than its factorization.

31100312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9474.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31100312131 its reverse (13121300113), we get a palindrome (44221612244).

The spelling of 31100312131 in words is "thirty-one billion, one hundred million, three hundred twelve thousand, one hundred thirty-one".