13313641321 has 2 divisors, whose sum is σ = 13313641322. Its totient is φ = 13313641320.

The previous prime is 13313641279. The next prime is 13313641343. The reversal of 13313641321 is 12314631331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11542494096 + 1771147225 = 107436^2 + 42085^2 .

It is an emirp because it is prime and its reverse (12314631331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13313641321 - 2²⁵ = 13280086889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13313641321.

It is not a weakly prime, because it can be changed into another prime (13313641721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656820660 + 6656820661.

It is an arithmetic number, because the mean of its divisors is an integer number (6656820661).

Almost surely, 2^13313641321 is an apocalyptic number.

It is an amenable number.

13313641321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13313641321 is an equidigital number, since it uses as much as digits as its factorization.

13313641321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 28.

The spelling of 13313641321 in words is "thirteen billion, three hundred thirteen million, six hundred forty-one thousand, three hundred twenty-one".