204121133 has 2 divisors, whose sum is σ = 204121134. Its totient is φ = 204121132.

The previous prime is 204121109. The next prime is 204121201. The reversal of 204121133 is 331121402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200873929 + 3247204 = 14173^2 + 1802^2 .

It is a cyclic number.

It is not a de Polignac number, because 204121133 - 2¹⁰ = 204120109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204121103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102060566 + 102060567.

It is an arithmetic number, because the mean of its divisors is an integer number (102060567).

Almost surely, 2^204121133 is an apocalyptic number.

It is an amenable number.

204121133 is a deficient number, since it is larger than the sum of its proper divisors (1).

204121133 is an equidigital number, since it uses as much as digits as its factorization.

204121133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 204121133 is about 14287.0967309667. The cubic root of 204121133 is about 588.7930252259.

Adding to 204121133 its reverse (331121402), we get a palindrome (535242535).

The spelling of 204121133 in words is "two hundred four million, one hundred twenty-one thousand, one hundred thirty-three".