204121241 has 2 divisors, whose sum is σ = 204121242. Its totient is φ = 204121240.

The previous prime is 204121231. The next prime is 204121243. The reversal of 204121241 is 142121402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202920025 + 1201216 = 14245^2 + 1096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204121241 is a prime.

Together with 204121243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204121243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102060620 + 102060621.

It is an arithmetic number, because the mean of its divisors is an integer number (102060621).

Almost surely, 2^204121241 is an apocalyptic number.

It is an amenable number.

204121241 is a deficient number, since it is larger than the sum of its proper divisors (1).

204121241 is an equidigital number, since it uses as much as digits as its factorization.

204121241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 204121241 is about 14287.1005106005. The cubic root of 204121241 is about 588.7931290688.

Adding to 204121241 its reverse (142121402), we get a palindrome (346242643).

The spelling of 204121241 in words is "two hundred four million, one hundred twenty-one thousand, two hundred forty-one".