13331131331321 has 4 divisors (see below), whose sum is σ = 13331291881572. Its totient is φ = 13330970781072.

The previous prime is 13331131331311. The next prime is 13331131331339. The reversal of 13331131331321 is 12313313113331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7206674475625 + 6124456855696 = 2684525^2 + 2474764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13331131331321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13331131331311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80150510 + ... + 80316663.

It is an arithmetic number, because the mean of its divisors is an integer number (3332822970393).

Almost surely, 2^{13331131331321} is an apocalyptic number.

It is an amenable number.

13331131331321 is a deficient number, since it is larger than the sum of its proper divisors (160550251).

13331131331321 is an equidigital number, since it uses as much as digits as its factorization.

13331131331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160550250.

The product of its digits is 4374, while the sum is 29.

Adding to 13331131331321 its reverse (12313313113331), we get a palindrome (25644444444652).

The spelling of 13331131331321 in words is "thirteen trillion, three hundred thirty-one billion, one hundred thirty-one million, three hundred thirty-one thousand, three hundred twenty-one".