13021123112 has 16 divisors (see below), whose sum is σ = 24578464500. Its totient is φ = 6466865920.

The previous prime is 13021123081. The next prime is 13021123117. The reversal of 13021123112 is 21132112031.

It can be written as a sum of positive squares in 2 ways, for example, as 9301830916 + 3719292196 = 96446^2 + 60986^2 .

It is not an unprimeable number, because it can be changed into a prime (13021123117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5460689 + ... + 5463072.

Almost surely, 2^13021123112 is an apocalyptic number.

It is an amenable number.

13021123112 is a deficient number, since it is larger than the sum of its proper divisors (11557341388).

13021123112 is a wasteful number, since it uses less digits than its factorization.

13021123112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10923916 (or 10923912 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 13021123112 its reverse (21132112031), we get a palindrome (34153235143).

The spelling of 13021123112 in words is "thirteen billion, twenty-one million, one hundred twenty-three thousand, one hundred twelve".