204021124 has 6 divisors (see below), whose sum is σ = 357036974. Its totient is φ = 102010560.

The previous prime is 204021121. The next prime is 204021151. The reversal of 204021124 is 421120402.

204021124 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 127283524 + 76737600 = 11282^2 + 8760^2 .

204021124 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 204021098 and 204021107.

It is not an unprimeable number, because it can be changed into a prime (204021121) 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 as a sum of consecutive naturals, namely, 25502637 + ... + 25502644.

Almost surely, 2^204021124 is an apocalyptic number.

It is an amenable number.

204021124 is a deficient number, since it is larger than the sum of its proper divisors (153015850).

204021124 is a wasteful number, since it uses less digits than its factorization.

204021124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51005285 (or 51005283 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 204021124 is about 14283.5963258558. The cubic root of 204021124 is about 588.6968499463.

Adding to 204021124 its reverse (421120402), we get a palindrome (625141526).

The spelling of 204021124 in words is "two hundred four million, twenty-one thousand, one hundred twenty-four".