31212133121213 has 16 divisors (see below), whose sum is σ = 34088768179200. Its totient is φ = 28342044385200.

The previous prime is 31212133121207. The next prime is 31212133121231.

31212133121213 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 31212133121213 - 2⁸ = 31212133120957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212133121513) 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, 33878798 + ... + 34787888.

It is an arithmetic number, because the mean of its divisors is an integer number (2130548011200).

Almost surely, 2^{31212133121213} is an apocalyptic number.

It is an amenable number.

31212133121213 is a deficient number, since it is larger than the sum of its proper divisors (2876635057987).

31212133121213 is a wasteful number, since it uses less digits than its factorization.

31212133121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912688.

The product of its digits is 1296, while the sum is 26.

It can be divided in two parts, 3121213 and 3121213, that added together give a palindrome (6242426).

The spelling of 31212133121213 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirty-three million, one hundred twenty-one thousand, two hundred thirteen".