12312021304 has 32 divisors (see below), whose sum is σ = 25559568000. Its totient is φ = 5512842720.

The previous prime is 12312021283. The next prime is 12312021307. The reversal of 12312021304 is 40312021321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312021307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038204 + ... + 1049995.

It is an arithmetic number, because the mean of its divisors is an integer number (798736500).

Almost surely, 2^12312021304 is an apocalyptic number.

It is an amenable number.

12312021304 is an abundant number, since it is smaller than the sum of its proper divisors (13247546696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12312021304 is a wasteful number, since it uses less digits than its factorization.

12312021304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088283 (or 2088279 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12312021304 its reverse (40312021321), we get a palindrome (52624042625).

The spelling of 12312021304 in words is "twelve billion, three hundred twelve million, twenty-one thousand, three hundred four".