204121205 has 24 divisors (see below), whose sum is σ = 264249216. Its totient is φ = 151076640.

The previous prime is 204121201. The next prime is 204121207. The reversal of 204121205 is 502121402.

It is not a de Polignac number, because 204121205 - 2² = 204121201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204121201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109592 + ... + 111438.

It is an arithmetic number, because the mean of its divisors is an integer number (11010384).

Almost surely, 2^204121205 is an apocalyptic number.

It is an amenable number.

204121205 is a deficient number, since it is larger than the sum of its proper divisors (60128011).

204121205 is a wasteful number, since it uses less digits than its factorization.

204121205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937 (or 1906 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 204121205 is about 14287.0992507227. The cubic root of 204121205 is about 588.7930944545.

Adding to 204121205 its reverse (502121402), we get a palindrome (706242607).

The spelling of 204121205 in words is "two hundred four million, one hundred twenty-one thousand, two hundred five".