12303131021 has 4 divisors (see below), whose sum is σ = 12364956000. Its totient is φ = 12241306044.

The previous prime is 12303131017. The next prime is 12303131059. The reversal of 12303131021 is 12013130321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12303131021 - 2² = 12303131017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12303131011) 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, 30912191 + ... + 30912588.

It is an arithmetic number, because the mean of its divisors is an integer number (3091239000).

Almost surely, 2^12303131021 is an apocalyptic number.

It is an amenable number.

12303131021 is a deficient number, since it is larger than the sum of its proper divisors (61824979).

12303131021 is an equidigital number, since it uses as much as digits as its factorization.

12303131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61824978.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12303131021 its reverse (12013130321), we get a palindrome (24316261342).

The spelling of 12303131021 in words is "twelve billion, three hundred three million, one hundred thirty-one thousand, twenty-one".