21331322269 has 2 divisors, whose sum is σ = 21331322270. Its totient is φ = 21331322268.

The previous prime is 21331322261. The next prime is 21331322281. The reversal of 21331322269 is 96222313312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15190562500 + 6140759769 = 123250^2 + 78363^2 .

It is a cyclic number.

It is not a de Polignac number, because 21331322269 - 2³ = 21331322261 is a prime.

It is a super-2 number, since 2×21331322269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21331322261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665661134 + 10665661135.

It is an arithmetic number, because the mean of its divisors is an integer number (10665661135).

Almost surely, 2^21331322269 is an apocalyptic number.

It is an amenable number.

21331322269 is a deficient number, since it is larger than the sum of its proper divisors (1).

21331322269 is an equidigital number, since it uses as much as digits as its factorization.

21331322269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 34.

The spelling of 21331322269 in words is "twenty-one billion, three hundred thirty-one million, three hundred twenty-two thousand, two hundred sixty-nine".