13021320303 has 12 divisors (see below), whose sum is σ = 19626338160. Its totient is φ = 8303450496.

The previous prime is 13021320283. The next prime is 13021320337. The reversal of 13021320303 is 30302312031.

13021320303 is a `hidden beast` number, since 130 + 213 + 20 + 303 = 666.

It is not a de Polignac number, because 13021320303 - 2⁸ = 13021320047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021320373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31452258 + ... + 31452671.

It is an arithmetic number, because the mean of its divisors is an integer number (1635528180).

Almost surely, 2^13021320303 is an apocalyptic number.

13021320303 is a deficient number, since it is larger than the sum of its proper divisors (6605017857).

13021320303 is a wasteful number, since it uses less digits than its factorization.

13021320303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62904958 (or 62904955 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 13021320303 its sum of digits (18), we get a square (13021320321 = 114111²).

Adding to 13021320303 its reverse (30302312031), we get a palindrome (43323632334).

The spelling of 13021320303 in words is "thirteen billion, twenty-one million, three hundred twenty thousand, three hundred three".