204052121 has 36 divisors (see below), whose sum is σ = 263737404. Its totient is φ = 157248000.

The previous prime is 204052109. The next prime is 204052129. The reversal of 204052121 is 121250402.

It can be written as a sum of positive squares in 6 ways, for example, as 44408896 + 159643225 = 6664^2 + 12635^2 .

It is not a de Polignac number, because 204052121 - 2¹⁰ = 204051097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204052121.

It is not an unprimeable number, because it can be changed into a prime (204052129) 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 35 ways as a sum of consecutive naturals, for example, 339221 + ... + 339821.

It is an arithmetic number, because the mean of its divisors is an integer number (7326039).

Almost surely, 2^204052121 is an apocalyptic number.

It is an amenable number.

204052121 is a deficient number, since it is larger than the sum of its proper divisors (59685283).

204052121 is a wasteful number, since it uses less digits than its factorization.

204052121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 662 counting only the distinct ones).

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

The square root of 204052121 is about 14284.6813405130. The cubic root of 204052121 is about 588.7266620753.

The spelling of 204052121 in words is "two hundred four million, fifty-two thousand, one hundred twenty-one".