12232013231 has 4 divisors (see below), whose sum is σ = 12261207000. Its totient is φ = 12202819464.

The previous prime is 12232013221. The next prime is 12232013243. The reversal of 12232013231 is 13231023221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13231023221 = 13 ⋅1017771017.

It is a cyclic number.

It is not a de Polignac number, because 12232013231 - 2¹⁰ = 12232012207 is a prime.

It is a super-2 number, since 2×12232013231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12232013221) 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, 14596256 + ... + 14597093.

It is an arithmetic number, because the mean of its divisors is an integer number (3065301750).

Almost surely, 2^12232013231 is an apocalyptic number.

12232013231 is a deficient number, since it is larger than the sum of its proper divisors (29193769).

12232013231 is an equidigital number, since it uses as much as digits as its factorization.

12232013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29193768.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12232013231 its reverse (13231023221), we get a palindrome (25463036452).

The spelling of 12232013231 in words is "twelve billion, two hundred thirty-two million, thirteen thousand, two hundred thirty-one".