21231331222313 has 8 divisors (see below), whose sum is σ = 21726490582368. Its totient is φ = 20736235838304.

The previous prime is 21231331222289. The next prime is 21231331222403. The reversal of 21231331222313 is 31322213313212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21231331222313 - 2²⁰ = 21231330173737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21231331282313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15322220 + ... + 16650317.

It is an arithmetic number, because the mean of its divisors is an integer number (2715811322796).

Almost surely, 2^{21231331222313} is an apocalyptic number.

It is an amenable number.

21231331222313 is a deficient number, since it is larger than the sum of its proper divisors (495159360055).

21231331222313 is a wasteful number, since it uses less digits than its factorization.

21231331222313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31988023.

The product of its digits is 7776, while the sum is 29.

Adding to 21231331222313 its reverse (31322213313212), we get a palindrome (52553544535525).

The spelling of 21231331222313 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred thirty-one million, two hundred twenty-two thousand, three hundred thirteen".