204224121 has 12 divisors (see below), whose sum is σ = 297912420. Its totient is φ = 134800800.

The previous prime is 204224101. The next prime is 204224129. The reversal of 204224121 is 121422402.

204224121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 122412096 + 81812025 = 11064^2 + 9045^2 .

It is not a de Polignac number, because 204224121 - 2⁵ = 204224089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204224094 and 204224103.

It is not an unprimeable number, because it can be changed into a prime (204224129) 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, 111426 + ... + 113243.

It is an arithmetic number, because the mean of its divisors is an integer number (24826035).

Almost surely, 2^204224121 is an apocalyptic number.

It is an amenable number.

204224121 is a deficient number, since it is larger than the sum of its proper divisors (93688299).

204224121 is a wasteful number, since it uses less digits than its factorization.

204224121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224776 (or 224773 counting only the distinct ones).

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

The square root of 204224121 is about 14290.7005076728. The cubic root of 204224121 is about 588.8920324833.

Adding to 204224121 its reverse (121422402), we get a palindrome (325646523).

The spelling of 204224121 in words is "two hundred four million, two hundred twenty-four thousand, one hundred twenty-one".