204121113 has 24 divisors (see below), whose sum is σ = 330366528. Its totient is φ = 111567456.

The previous prime is 204121109. The next prime is 204121133. The reversal of 204121113 is 311121402.

It is not a de Polignac number, because 204121113 - 2² = 204121109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204121092 and 204121101.

It is not an unprimeable number, because it can be changed into a prime (204121103) 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 23 ways as a sum of consecutive naturals, for example, 26806 + ... + 33567.

It is an arithmetic number, because the mean of its divisors is an integer number (13765272).

Almost surely, 2^204121113 is an apocalyptic number.

204121113 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

204121113 is a deficient number, since it is larger than the sum of its proper divisors (126245415).

204121113 is a wasteful number, since it uses less digits than its factorization.

204121113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60413 (or 60406 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 204121113 is about 14287.0960310344. The cubic root of 204121113 is about 588.7930059957.

Adding to 204121113 its reverse (311121402), we get a palindrome (515242515).

The spelling of 204121113 in words is "two hundred four million, one hundred twenty-one thousand, one hundred thirteen".