31312100102131 has 4 divisors (see below), whose sum is σ = 31431157517232. Its totient is φ = 31193042687032.

The previous prime is 31312100102077. The next prime is 31312100102159. The reversal of 31312100102131 is 13120100121313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31312100102131 - 2¹⁷ = 31312099971059 is a prime.

It is a super-2 number, since 2×31312100102131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31312100102099 and 31312100102108.

It is not an unprimeable number, because it can be changed into a prime (31312100109131) 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, 59528707156 + ... + 59528707681.

It is an arithmetic number, because the mean of its divisors is an integer number (7857789379308).

Almost surely, 2^{31312100102131} is an apocalyptic number.

31312100102131 is a deficient number, since it is larger than the sum of its proper divisors (119057415101).

31312100102131 is a wasteful number, since it uses less digits than its factorization.

31312100102131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119057415100.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 31312100102131 its reverse (13120100121313), we get a palindrome (44432200223444).

The spelling of 31312100102131 in words is "thirty-one trillion, three hundred twelve billion, one hundred million, one hundred two thousand, one hundred thirty-one".