204004234121 has 4 divisors (see below), whose sum is σ = 204014616192. Its totient is φ = 203993852052.

The previous prime is 204004234117. The next prime is 204004234141. The reversal of 204004234121 is 121432400402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204004234121 - 2² = 204004234117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204004234111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5161505 + ... + 5200878.

It is an arithmetic number, because the mean of its divisors is an integer number (51003654048).

Almost surely, 2^204004234121 is an apocalyptic number.

It is an amenable number.

204004234121 is a deficient number, since it is larger than the sum of its proper divisors (10382071).

204004234121 is a wasteful number, since it uses less digits than its factorization.

204004234121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10382070.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 204004234121 its reverse (121432400402), we get a palindrome (325436634523).

The spelling of 204004234121 in words is "two hundred four billion, four million, two hundred thirty-four thousand, one hundred twenty-one".