12312303221 has 4 divisors (see below), whose sum is σ = 12960319200. Its totient is φ = 11664287244.

The previous prime is 12312303169. The next prime is 12312303229. The reversal of 12312303221 is 12230321321.

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 a de Polignac number, because none of the positive numbers 2^k-12312303221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12312303193 and 12312303202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312303229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324007961 + ... + 324007998.

It is an arithmetic number, because the mean of its divisors is an integer number (3240079800).

Almost surely, 2^12312303221 is an apocalyptic number.

It is an amenable number.

12312303221 is a deficient number, since it is larger than the sum of its proper divisors (648015979).

12312303221 is an equidigital number, since it uses as much as digits as its factorization.

12312303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648015978.

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

Adding to 12312303221 its reverse (12230321321), we get a palindrome (24542624542).

The spelling of 12312303221 in words is "twelve billion, three hundred twelve million, three hundred three thousand, two hundred twenty-one".