204130221321 has 64 divisors (see below), whose sum is σ = 319985568000. Its totient is φ = 114612019200.

The previous prime is 204130221289. The next prime is 204130221341. The reversal of 204130221321 is 123122031402.

It is not a de Polignac number, because 204130221321 - 2⁵ = 204130221289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204130221341) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8605245 + ... + 8628933.

It is an arithmetic number, because the mean of its divisors is an integer number (4999774500).

Almost surely, 2^204130221321 is an apocalyptic number.

It is an amenable number.

204130221321 is a deficient number, since it is larger than the sum of its proper divisors (115855346679).

204130221321 is a wasteful number, since it uses less digits than its factorization.

204130221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24154.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 204130221321 its reverse (123122031402), we get a palindrome (327252252723).

The spelling of 204130221321 in words is "two hundred four billion, one hundred thirty million, two hundred twenty-one thousand, three hundred twenty-one".