204002310221 has 4 divisors (see below), whose sum is σ = 206294471100. Its totient is φ = 201710149344.

The previous prime is 204002310217. The next prime is 204002310241. The reversal of 204002310221 is 122013200402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69121668100 + 134880642121 = 262910^2 + 367261^2 .

It is a cyclic number.

It is not a de Polignac number, because 204002310221 - 2² = 204002310217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204002310221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204002310241) 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, 1146080306 + ... + 1146080483.

It is an arithmetic number, because the mean of its divisors is an integer number (51573617775).

Almost surely, 2^204002310221 is an apocalyptic number.

It is an amenable number.

204002310221 is a deficient number, since it is larger than the sum of its proper divisors (2292160879).

204002310221 is an equidigital number, since it uses as much as digits as its factorization.

204002310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292160878.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 204002310221 its reverse (122013200402), we get a palindrome (326015510623).

The spelling of 204002310221 in words is "two hundred four billion, two million, three hundred ten thousand, two hundred twenty-one".