13183318021 has 2 divisors, whose sum is σ = 13183318022. Its totient is φ = 13183318020.

The previous prime is 13183318009. The next prime is 13183318061. The reversal of 13183318021 is 12081338131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12118927396 + 1064390625 = 110086^2 + 32625^2 .

It is a cyclic number.

It is not a de Polignac number, because 13183318021 - 2⁵ = 13183317989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13183318061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6591659010 + 6591659011.

It is an arithmetic number, because the mean of its divisors is an integer number (6591659011).

Almost surely, 2^13183318021 is an apocalyptic number.

It is an amenable number.

13183318021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13183318021 is an equidigital number, since it uses as much as digits as its factorization.

13183318021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 13183318021 in words is "thirteen billion, one hundred eighty-three million, three hundred eighteen thousand, twenty-one".