13013231121 has 64 divisors (see below), whose sum is σ = 21588295680. Its totient is φ = 7678800000.

The previous prime is 13013231117. The next prime is 13013231137. The reversal of 13013231121 is 12113231031.

13013231121 is a `hidden beast` number, since 1 + 301 + 32 + 311 + 21 = 666.

It is not a de Polignac number, because 13013231121 - 2² = 13013231117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13013231094 and 13013231103.

It is not an unprimeable number, because it can be changed into a prime (13013231141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9144216 + ... + 9145638.

It is an arithmetic number, because the mean of its divisors is an integer number (337317120).

Almost surely, 2^13013231121 is an apocalyptic number.

13013231121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13013231121 is a deficient number, since it is larger than the sum of its proper divisors (8575064559).

13013231121 is a wasteful number, since it uses less digits than its factorization.

13013231121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 13013231121 its reverse (12113231031), we get a palindrome (25126462152).

The spelling of 13013231121 in words is "thirteen billion, thirteen million, two hundred thirty-one thousand, one hundred twenty-one".