13313312161 has 2 divisors, whose sum is σ = 13313312162. Its totient is φ = 13313312160.

The previous prime is 13313312137. The next prime is 13313312189. The reversal of 13313312161 is 16121331331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9085711761 + 4227600400 = 95319^2 + 65020^2 .

It is a cyclic number.

It is not a de Polignac number, because 13313312161 - 2¹⁵ = 13313279393 is a prime.

It is not a weakly prime, because it can be changed into another prime (13313312101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656656080 + 6656656081.

It is an arithmetic number, because the mean of its divisors is an integer number (6656656081).

Almost surely, 2^13313312161 is an apocalyptic number.

It is an amenable number.

13313312161 is a deficient number, since it is larger than the sum of its proper divisors (1).

13313312161 is an equidigital number, since it uses as much as digits as its factorization.

13313312161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 25.

Adding to 13313312161 its reverse (16121331331), we get a palindrome (29434643492).

The spelling of 13313312161 in words is "thirteen billion, three hundred thirteen million, three hundred twelve thousand, one hundred sixty-one".