204204104121 has 4 divisors (see below), whose sum is σ = 272272138832. Its totient is φ = 136136069412.

The previous prime is 204204104119. The next prime is 204204104141. The reversal of 204204104121 is 121401402402.

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 not a de Polignac number, because 204204104121 - 2¹ = 204204104119 is a prime.

It is a super-2 number, since 2×204204104121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204204104141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34034017351 + ... + 34034017356.

It is an arithmetic number, because the mean of its divisors is an integer number (68068034708).

Almost surely, 2^204204104121 is an apocalyptic number.

It is an amenable number.

204204104121 is a deficient number, since it is larger than the sum of its proper divisors (68068034711).

204204104121 is an equidigital number, since it uses as much as digits as its factorization.

204204104121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68068034710.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 204204104121 its reverse (121401402402), we get a palindrome (325605506523).

The spelling of 204204104121 in words is "two hundred four billion, two hundred four million, one hundred four thousand, one hundred twenty-one".