31100113212231 has 16 divisors (see below), whose sum is σ = 47397111593984. Its totient is φ = 17769069680544.

The previous prime is 31100113212211. The next prime is 31100113212239. The reversal of 31100113212231 is 13221231100113.

It is not a de Polignac number, because 31100113212231 - 2¹⁰ = 31100113211207 is a prime.

It is a super-2 number, since 2×31100113212231² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31100113212198 and 31100113212207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31100113212239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100824991 + ... + 101132976.

It is an arithmetic number, because the mean of its divisors is an integer number (2962319474624).

Almost surely, 2^{31100113212231} is an apocalyptic number.

31100113212231 is a deficient number, since it is larger than the sum of its proper divisors (16296998381753).

31100113212231 is a wasteful number, since it uses less digits than its factorization.

31100113212231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201965310.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31100113212231 its reverse (13221231100113), we get a palindrome (44321344312344).

The spelling of 31100113212231 in words is "thirty-one trillion, one hundred billion, one hundred thirteen million, two hundred twelve thousand, two hundred thirty-one".