13121303321 has 16 divisors (see below), whose sum is σ = 15144105600. Its totient is φ = 11135698560.

The previous prime is 13121303311. The next prime is 13121303329. The reversal of 13121303321 is 12330312131.

It is not a de Polignac number, because 13121303321 - 2¹⁰ = 13121302297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13121303293 and 13121303302.

It is not an unprimeable number, because it can be changed into a prime (13121303329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1884755 + ... + 1891703.

It is an arithmetic number, because the mean of its divisors is an integer number (946506600).

Almost surely, 2^13121303321 is an apocalyptic number.

It is an amenable number.

13121303321 is a deficient number, since it is larger than the sum of its proper divisors (2022802279).

13121303321 is a wasteful number, since it uses less digits than its factorization.

13121303321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9584.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 13121303321 its reverse (12330312131), we get a palindrome (25451615452).

The spelling of 13121303321 in words is "thirteen billion, one hundred twenty-one million, three hundred three thousand, three hundred twenty-one".