204121291 has 8 divisors (see below), whose sum is σ = 222783984. Its totient is φ = 185476320.

The previous prime is 204121289. The next prime is 204121327. The reversal of 204121291 is 192121402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204121291 - 2¹ = 204121289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204121201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34825 + ... + 40261.

It is an arithmetic number, because the mean of its divisors is an integer number (27847998).

Almost surely, 2^204121291 is an apocalyptic number.

204121291 is a deficient number, since it is larger than the sum of its proper divisors (18662693).

204121291 is a wasteful number, since it uses less digits than its factorization.

204121291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8861.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 204121291 is about 14287.1022604306. The cubic root of 204121291 is about 588.7931771443.

Adding to 204121291 its reverse (192121402), we get a palindrome (396242693).

It can be divided in two parts, 2041 and 21291, that added together give a palindrome (23332).

The spelling of 204121291 in words is "two hundred four million, one hundred twenty-one thousand, two hundred ninety-one".