204120311 has 4 divisors (see below), whose sum is σ = 204248472. Its totient is φ = 203992152.

The previous prime is 204120289. The next prime is 204120313. The reversal of 204120311 is 113021402.

204120311 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 is a cyclic number.

It is not a de Polignac number, because 204120311 - 2⁶ = 204120247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204120313) 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, 61661 + ... + 64886.

It is an arithmetic number, because the mean of its divisors is an integer number (51062118).

Almost surely, 2^204120311 is an apocalyptic number.

204120311 is a deficient number, since it is larger than the sum of its proper divisors (128161).

204120311 is a wasteful number, since it uses less digits than its factorization.

204120311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128160.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 204120311 is about 14287.0679637216. The cubic root of 204120311 is about 588.7922348643.

Adding to 204120311 its reverse (113021402), we get a palindrome (317141713).

The spelling of 204120311 in words is "two hundred four million, one hundred twenty thousand, three hundred eleven".