13231430121 has 48 divisors (see below), whose sum is σ = 22916229504. Its totient is φ = 6611839488.

The previous prime is 13231430101. The next prime is 13231430129. The reversal of 13231430121 is 12103413231.

It is not a de Polignac number, because 13231430121 - 2⁷ = 13231429993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (13231430129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31425 + ... + 165681.

It is an arithmetic number, because the mean of its divisors is an integer number (477421448).

Almost surely, 2^13231430121 is an apocalyptic number.

It is an amenable number.

13231430121 is a deficient number, since it is larger than the sum of its proper divisors (9684799383).

13231430121 is a wasteful number, since it uses less digits than its factorization.

13231430121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134318 (or 134299 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 13231430121 its reverse (12103413231), we get a palindrome (25334843352).

The spelling of 13231430121 in words is "thirteen billion, two hundred thirty-one million, four hundred thirty thousand, one hundred twenty-one".