13021233121 has 16 divisors (see below), whose sum is σ = 14981243200. Its totient is φ = 11217019968.

The previous prime is 13021233119. The next prime is 13021233151. The reversal of 13021233121 is 12133212031.

It is not a de Polignac number, because 13021233121 - 2¹ = 13021233119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13021233151) 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, 376866 + ... + 409963.

It is an arithmetic number, because the mean of its divisors is an integer number (936327700).

Almost surely, 2^13021233121 is an apocalyptic number.

It is an amenable number.

13021233121 is a deficient number, since it is larger than the sum of its proper divisors (1960010079).

13021233121 is a wasteful number, since it uses less digits than its factorization.

13021233121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786928.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13021233121 its reverse (12133212031), we get a palindrome (25154445152).

The spelling of 13021233121 in words is "thirteen billion, twenty-one million, two hundred thirty-three thousand, one hundred twenty-one".