204221032044021 has 6 divisors (see below), whose sum is σ = 294985935174710. Its totient is φ = 136147354696008.

The previous prime is 204221032043947. The next prime is 204221032044097. The reversal of 204221032044021 is 120440230122402.

It is a happy number.

204221032044021 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 210 + 3 + 2 + 0 + 440 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 203304964835025 + 916067208996 = 14258505^2 + 957114^2 .

It is not a de Polignac number, because 204221032044021 - 2⁷ = 204221032043893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204221032044121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11345612891326 + ... + 11345612891343.

Almost surely, 2^{204221032044021} is an apocalyptic number.

It is an amenable number.

204221032044021 is a deficient number, since it is larger than the sum of its proper divisors (90764903130689).

204221032044021 is a wasteful number, since it uses less digits than its factorization.

204221032044021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22691225782675 (or 22691225782672 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 204221032044021 its reverse (120440230122402), we get a palindrome (324661262166423).

The spelling of 204221032044021 in words is "two hundred four trillion, two hundred twenty-one billion, thirty-two million, forty-four thousand, twenty-one".