204122321 has 8 divisors (see below), whose sum is σ = 226915584. Its totient is φ = 182342160.

The previous prime is 204122299. The next prime is 204122341. The reversal of 204122321 is 123221402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204122321 - 2²² = 199928017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204122321.

It is not an unprimeable number, because it can be changed into a prime (204122341) 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, 252851 + ... + 253656.

It is an arithmetic number, because the mean of its divisors is an integer number (28364448).

Almost surely, 2^204122321 is an apocalyptic number.

It is an amenable number.

204122321 is a deficient number, since it is larger than the sum of its proper divisors (22793263).

204122321 is a wasteful number, since it uses less digits than its factorization.

204122321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506551.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 204122321 is about 14287.1383068829. The cubic root of 204122321 is about 588.7941674965.

Adding to 204122321 its reverse (123221402), we get a palindrome (327343723).

The spelling of 204122321 in words is "two hundred four million, one hundred twenty-two thousand, three hundred twenty-one".