21331213222311 has 24 divisors (see below), whose sum is σ = 31131211697040. Its totient is φ = 14073383149056.

The previous prime is 21331213222301. The next prime is 21331213222337. The reversal of 21331213222311 is 11322231213312.

21331213222311 is a `hidden beast` number, since 2 + 1 + 3 + 3 + 1 + 21 + 322 + 2 + 311 = 666.

It is not a de Polignac number, because 21331213222311 - 2¹⁴ = 21331213205927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331213222301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14478016 + ... + 15883178.

It is an arithmetic number, because the mean of its divisors is an integer number (1297133820710).

Almost surely, 2^{21331213222311} is an apocalyptic number.

21331213222311 is a deficient number, since it is larger than the sum of its proper divisors (9799998474729).

21331213222311 is a wasteful number, since it uses less digits than its factorization.

21331213222311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422655 (or 1422652 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 21331213222311 its reverse (11322231213312), we get a palindrome (32653444435623).

The spelling of 21331213222311 in words is "twenty-one trillion, three hundred thirty-one billion, two hundred thirteen million, two hundred twenty-two thousand, three hundred eleven".