13021320331203 has 16 divisors (see below), whose sum is σ = 18210380136960. Its totient is φ = 8266554134496.

The previous prime is 13021320331183. The next prime is 13021320331213. The reversal of 13021320331203 is 30213302312031.

It is not a de Polignac number, because 13021320331203 - 2⁶ = 13021320331139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13021320331213) 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, 1247964913 + ... + 1247975346.

It is an arithmetic number, because the mean of its divisors is an integer number (1138148758560).

Almost surely, 2^{13021320331203} is an apocalyptic number.

13021320331203 is a deficient number, since it is larger than the sum of its proper divisors (5189059805757).

13021320331203 is a wasteful number, since it uses less digits than its factorization.

13021320331203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495940346.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 13021320331203 its reverse (30213302312031), we get a palindrome (43234622643234).

The spelling of 13021320331203 in words is "thirteen trillion, twenty-one billion, three hundred twenty million, three hundred thirty-one thousand, two hundred three".