13313321321 has 2 divisors, whose sum is σ = 13313321322. Its totient is φ = 13313321320.

The previous prime is 13313321297. The next prime is 13313321327. The reversal of 13313321321 is 12312331331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13027711321 + 285610000 = 114139^2 + 16900^2 .

It is a cyclic number.

It is not a de Polignac number, because 13313321321 - 2²⁶ = 13246212457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13313321327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656660660 + 6656660661.

It is an arithmetic number, because the mean of its divisors is an integer number (6656660661).

Almost surely, 2^13313321321 is an apocalyptic number.

It is an amenable number.

13313321321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13313321321 is an equidigital number, since it uses as much as digits as its factorization.

13313321321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 23.

Adding to 13313321321 its reverse (12312331331), we get a palindrome (25625652652).

The spelling of 13313321321 in words is "thirteen billion, three hundred thirteen million, three hundred twenty-one thousand, three hundred twenty-one".