31221233212213 has 16 divisors (see below), whose sum is σ = 35582845052160. Its totient is φ = 27132888328000.

The previous prime is 31221233212133. The next prime is 31221233212291.

31221233212213 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 31221233212213 - 2¹⁷ = 31221233081141 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 (31221233216213) 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, 484483645 + ... + 484548082.

It is an arithmetic number, because the mean of its divisors is an integer number (2223927815760).

Almost surely, 2^{31221233212213} is an apocalyptic number.

It is an amenable number.

31221233212213 is a deficient number, since it is larger than the sum of its proper divisors (4361611839947).

31221233212213 is a wasteful number, since it uses less digits than its factorization.

31221233212213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969031868.

The product of its digits is 5184, while the sum is 28.

It can be divided in two parts, 3122123 and 3212213, that added together give a palindrome (6334336).

The spelling of 31221233212213 in words is "thirty-one trillion, two hundred twenty-one billion, two hundred thirty-three million, two hundred twelve thousand, two hundred thirteen".