31212200221213 has 16 divisors (see below), whose sum is σ = 35546535660672. Its totient is φ = 27128483712000.

The previous prime is 31212200221211. The next prime is 31212200221339.

31212200221213 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31212200221213 - 2¹ = 31212200221211 is a prime.

It is a super-2 number, since 2×31212200221213² (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 (31212200221211) 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, 27997548 + ... + 29091013.

It is an arithmetic number, because the mean of its divisors is an integer number (2221658478792).

Almost surely, 2^{31212200221213} is an apocalyptic number.

It is an amenable number.

31212200221213 is a deficient number, since it is larger than the sum of its proper divisors (4334335439459).

31212200221213 is a wasteful number, since it uses less digits than its factorization.

31212200221213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57090756.

The product of its (nonzero) digits is 576, while the sum is 22.

Multiplying 31212200221213 by its sum of digits (22), we get a palindrome (686668404866686).

It can be divided in two parts, 31212200 and 221213, that added together give a palindrome (31433413).

The spelling of 31212200221213 in words is "thirty-one trillion, two hundred twelve billion, two hundred million, two hundred twenty-one thousand, two hundred thirteen".