12431332121 has 16 divisors (see below), whose sum is σ = 13852903680. Its totient is φ = 11082234240.

The previous prime is 12431332099. The next prime is 12431332129. The reversal of 12431332121 is 12123313421.

It is a cyclic number.

It is not a de Polignac number, because 12431332121 - 2¹⁰ = 12431331097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12431332129) 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, 75185 + ... + 174686.

It is an arithmetic number, because the mean of its divisors is an integer number (865806480).

Almost surely, 2^12431332121 is an apocalyptic number.

It is an amenable number.

12431332121 is a deficient number, since it is larger than the sum of its proper divisors (1421571559).

12431332121 is a wasteful number, since it uses less digits than its factorization.

12431332121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250016.

The product of its digits is 864, while the sum is 23.

Adding to 12431332121 its reverse (12123313421), we get a palindrome (24554645542).

The spelling of 12431332121 in words is "twelve billion, four hundred thirty-one million, three hundred thirty-two thousand, one hundred twenty-one".