13012223021 has 16 divisors (see below), whose sum is σ = 15521303808. Its totient is φ = 10665916800.

The previous prime is 13012222981. The next prime is 13012223033. The reversal of 13012223021 is 12032221031.

It is not a de Polignac number, because 13012223021 - 2²⁶ = 12945114157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13012223041) 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, 1053401 + ... + 1065681.

It is an arithmetic number, because the mean of its divisors is an integer number (970081488).

Almost surely, 2^13012223021 is an apocalyptic number.

It is an amenable number.

13012223021 is a deficient number, since it is larger than the sum of its proper divisors (2509080787).

13012223021 is a wasteful number, since it uses less digits than its factorization.

13012223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18892.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13012223021 its reverse (12032221031), we get a palindrome (25044444052).

The spelling of 13012223021 in words is "thirteen billion, twelve million, two hundred twenty-three thousand, twenty-one".