204121224 has 48 divisors (see below), whose sum is σ = 553737600. Its totient is φ = 67928544.

The previous prime is 204121223. The next prime is 204121231. The reversal of 204121224 is 422121402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 204121197 and 204121206.

It is not an unprimeable number, because it can be changed into a prime (204121223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49797 + ... + 53739.

It is an arithmetic number, because the mean of its divisors is an integer number (11536200).

Almost surely, 2^204121224 is an apocalyptic number.

204121224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

204121224 is an abundant number, since it is smaller than the sum of its proper divisors (349616376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204121224 is a wasteful number, since it uses less digits than its factorization.

204121224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4674 (or 4667 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 204121224 is about 14287.0999156582. The cubic root of 204121224 is about 588.7931127232.

Adding to 204121224 its reverse (422121402), we get a palindrome (626242626).

The spelling of 204121224 in words is "two hundred four million, one hundred twenty-one thousand, two hundred twenty-four".