13221013023 has 24 divisors (see below), whose sum is σ = 19868937088. Its totient is φ = 8785248984.

The previous prime is 13221012941. The next prime is 13221013027. The reversal of 13221013023 is 32031012231.

It is not a de Polignac number, because 13221013023 - 2⁸ = 13221012767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13221012987 and 13221013005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221013027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14011 + ... + 163212.

Almost surely, 2^13221013023 is an apocalyptic number.

13221013023 is a deficient number, since it is larger than the sum of its proper divisors (6647924065).

13221013023 is an equidigital number, since it uses as much as digits as its factorization.

13221013023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177545 (or 177533 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 13221013023 its reverse (32031012231), we get a palindrome (45252025254).

The spelling of 13221013023 in words is "thirteen billion, two hundred twenty-one million, thirteen thousand, twenty-three".