204121131 has 8 divisors (see below), whose sum is σ = 274305024. Its totient is φ = 135009000.

The previous prime is 204121109. The next prime is 204121133. The reversal of 204121131 is 131121402.

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

It is not a de Polignac number, because 204121131 - 2⁷ = 204121003 is a prime.

It is a super-2 number, since 2×204121131² = 83330872241438322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204121131.

It is not an unprimeable number, because it can be changed into a prime (204121133) 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, 267495 + ... + 268256.

It is an arithmetic number, because the mean of its divisors is an integer number (34288128).

Almost surely, 2^204121131 is an apocalyptic number.

204121131 is a deficient number, since it is larger than the sum of its proper divisors (70183893).

204121131 is a wasteful number, since it uses less digits than its factorization.

204121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535881.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 204121131 is about 14287.0966609735. The cubic root of 204121131 is about 588.7930233028.

Adding to 204121131 its reverse (131121402), we get a palindrome (335242533).

The spelling of 204121131 in words is "two hundred four million, one hundred twenty-one thousand, one hundred thirty-one".