12321131023 has 4 divisors (see below), whose sum is σ = 12745997640. Its totient is φ = 11896264408.

The previous prime is 12321130951. The next prime is 12321131051. The reversal of 12321131023 is 32013112321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12321131023 - 2²¹ = 12319033871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321131323) 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, 212433265 + ... + 212433322.

It is an arithmetic number, because the mean of its divisors is an integer number (3186499410).

Almost surely, 2^12321131023 is an apocalyptic number.

12321131023 is a deficient number, since it is larger than the sum of its proper divisors (424866617).

12321131023 is an equidigital number, since it uses as much as digits as its factorization.

12321131023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424866616.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12321131023 its reverse (32013112321), we get a palindrome (44334243344).

The spelling of 12321131023 in words is "twelve billion, three hundred twenty-one million, one hundred thirty-one thousand, twenty-three".