31231100113213 has 32 divisors (see below), whose sum is σ = 41940961413120. Its totient is φ = 22459484122560.

The previous prime is 31231100113193. The next prime is 31231100113217.

31231100113213 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 31231100113213 - 2⁵ = 31231100113181 is a prime.

It is a super-2 number, since 2×31231100113213² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231100113217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1980456 + ... + 8147662.

It is an arithmetic number, because the mean of its divisors is an integer number (1310655044160).

Almost surely, 2^{31231100113213} is an apocalyptic number.

It is an amenable number.

31231100113213 is a deficient number, since it is larger than the sum of its proper divisors (10709861299907).

31231100113213 is a wasteful number, since it uses less digits than its factorization.

31231100113213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6172297.

The product of its (nonzero) digits is 324, while the sum is 22.

It can be divided in two parts, 31231100 and 113213, that added together give a palindrome (31344313).

The spelling of 31231100113213 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred million, one hundred thirteen thousand, two hundred thirteen".