200121204 has 12 divisors (see below), whose sum is σ = 466949504. Its totient is φ = 66707064.

The previous prime is 200121203. The next prime is 200121209. The reversal of 200121204 is 402121002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 16676767 = 200121204 / (2 + 0 + 0 + 1 + 2 + 1 + 2 + 0 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 200121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121203) 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, 8338372 + ... + 8338395.

Almost surely, 2^200121204 is an apocalyptic number.

It is an amenable number.

200121204 is an abundant number, since it is smaller than the sum of its proper divisors (266828300).

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

200121204 is a wasteful number, since it uses less digits than its factorization.

200121204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16676774 (or 16676772 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 200121204 is about 14146.4201832124. The cubic root of 200121204 is about 584.9216580020.

Adding to 200121204 its reverse (402121002), we get a palindrome (602242206).

The spelling of 200121204 in words is "two hundred million, one hundred twenty-one thousand, two hundred four".