204123201 has 4 divisors (see below), whose sum is σ = 272164272. Its totient is φ = 136082132.

The previous prime is 204123197. The next prime is 204123203. The reversal of 204123201 is 102321402.

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 a cyclic number.

It is not a de Polignac number, because 204123201 - 2² = 204123197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204123203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34020531 + ... + 34020536.

It is an arithmetic number, because the mean of its divisors is an integer number (68041068).

Almost surely, 2^204123201 is an apocalyptic number.

It is an amenable number.

204123201 is a deficient number, since it is larger than the sum of its proper divisors (68041071).

204123201 is an equidigital number, since it uses as much as digits as its factorization.

204123201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68041070.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 204123201 is about 14287.1691037798. The cubic root of 204123201 is about 588.7950136201.

Adding to 204123201 its reverse (102321402), we get a palindrome (306444603).

The spelling of 204123201 in words is "two hundred four million, one hundred twenty-three thousand, two hundred one".