13121313321 has 8 divisors (see below), whose sum is σ = 17649908640. Its totient is φ = 8670130112.

The previous prime is 13121313277. The next prime is 13121313329. The reversal of 13121313321 is 12331312131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13121313321 - 2²⁵ = 13087758889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13121313329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19352631 + ... + 19353308.

It is an arithmetic number, because the mean of its divisors is an integer number (2206238580).

Almost surely, 2^13121313321 is an apocalyptic number.

It is an amenable number.

13121313321 is a deficient number, since it is larger than the sum of its proper divisors (4528595319).

13121313321 is a wasteful number, since it uses less digits than its factorization.

13121313321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38706055.

The product of its digits is 324, while the sum is 21.

Adding to 13121313321 its reverse (12331312131), we get a palindrome (25452625452).

The spelling of 13121313321 in words is "thirteen billion, one hundred twenty-one million, three hundred thirteen thousand, three hundred twenty-one".