204522232121 has 4 divisors (see below), whose sum is σ = 204528516852. Its totient is φ = 204515947392.

The previous prime is 204522232099. The next prime is 204522232141. The reversal of 204522232121 is 121232225402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69145332025 + 135376900096 = 262955^2 + 367936^2 .

It is a cyclic number.

It is not a de Polignac number, because 204522232121 - 2³⁴ = 187342362937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204522232141) 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, 3093296 + ... + 3158721.

It is an arithmetic number, because the mean of its divisors is an integer number (51132129213).

Almost surely, 2^204522232121 is an apocalyptic number.

It is an amenable number.

204522232121 is a deficient number, since it is larger than the sum of its proper divisors (6284731).

204522232121 is an equidigital number, since it uses as much as digits as its factorization.

204522232121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6284730.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 204522232121 its reverse (121232225402), we get a palindrome (325754457523).

The spelling of 204522232121 in words is "two hundred four billion, five hundred twenty-two million, two hundred thirty-two thousand, one hundred twenty-one".