204120001 has 4 divisors (see below), whose sum is σ = 204289492. Its totient is φ = 203950512.

The previous prime is 204119947. The next prime is 204120019. The reversal of 204120001 is 100021402.

204120001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11048976 + 193071025 = 3324^2 + 13895^2 .

It is a cyclic number.

It is not a de Polignac number, because 204120001 - 2⁷ = 204119873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204120001.

It is not an unprimeable number, because it can be changed into a prime (204120031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82926 + ... + 85351.

It is an arithmetic number, because the mean of its divisors is an integer number (51072373).

Almost surely, 2^204120001 is an apocalyptic number.

It is an amenable number.

204120001 is a deficient number, since it is larger than the sum of its proper divisors (169491).

204120001 is a wasteful number, since it uses less digits than its factorization.

204120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169490.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 204120001 is about 14287.0571147455. The cubic root of 204120001 is about 588.7919367955.

Adding to 204120001 its reverse (100021402), we get a palindrome (304141403).

The spelling of 204120001 in words is "two hundred four million, one hundred twenty thousand, one".