204511121 has 4 divisors (see below), whose sum is σ = 204547392. Its totient is φ = 204474852.

The previous prime is 204511093. The next prime is 204511127. The reversal of 204511121 is 121115402.

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 204511121 - 2⁶ = 204511057 is a prime.

It is a super-2 number, since 2×204511121² = 83649597225353282, which contains 22 as substring.

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 204511121.

It is not an unprimeable number, because it can be changed into a prime (204511127) 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, 7661 + ... + 21626.

It is an arithmetic number, because the mean of its divisors is an integer number (51136848).

Almost surely, 2^204511121 is an apocalyptic number.

It is an amenable number.

204511121 is a deficient number, since it is larger than the sum of its proper divisors (36271).

204511121 is an equidigital number, since it uses as much as digits as its factorization.

204511121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36270.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 204511121 is about 14300.7384774354. The cubic root of 204511121 is about 589.1677637115.

Adding to 204511121 its reverse (121115402), we get a palindrome (325626523).

The spelling of 204511121 in words is "two hundred four million, five hundred eleven thousand, one hundred twenty-one".