204121312 has 24 divisors (see below), whose sum is σ = 425504016. Its totient is φ = 96056832.

The previous prime is 204121289. The next prime is 204121327. The reversal of 204121312 is 213121402.

204121312 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187068 + ... + 188155.

It is an arithmetic number, because the mean of its divisors is an integer number (17729334).

Almost surely, 2^204121312 is an apocalyptic number.

It is an amenable number.

204121312 is an abundant number, since it is smaller than the sum of its proper divisors (221382704).

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

204121312 is a wasteful number, since it uses less digits than its factorization.

204121312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375250 (or 375242 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 204121312 is about 14287.1029953591. The cubic root of 204121312 is about 588.7931973359.

Adding to 204121312 its reverse (213121402), we get a palindrome (417242714).

The spelling of 204121312 in words is "two hundred four million, one hundred twenty-one thousand, three hundred twelve".