204321312012 has 12 divisors (see below), whose sum is σ = 476749728056. Its totient is φ = 68107104000.

The previous prime is 204321312001. The next prime is 204321312023. The reversal of 204321312012 is 210213123402.

It is an interprime number because it is at equal distance from previous prime (204321312001) and next prime (204321312023).

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 204321312012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8513387989 + ... + 8513388012.

Almost surely, 2^204321312012 is an apocalyptic number.

It is an amenable number.

204321312012 is an abundant number, since it is smaller than the sum of its proper divisors (272428416044).

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

204321312012 is a wasteful number, since it uses less digits than its factorization.

204321312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17026776008 (or 17026776006 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 204321312012 its reverse (210213123402), we get a palindrome (414534435414).

The spelling of 204321312012 in words is "two hundred four billion, three hundred twenty-one million, three hundred twelve thousand, twelve".