204130305321 has 4 divisors (see below), whose sum is σ = 272173740432. Its totient is φ = 136086870212.

The previous prime is 204130305319. The next prime is 204130305343. The reversal of 204130305321 is 123503031402.

204130305321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204130305321 - 2¹ = 204130305319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204130305291 and 204130305300.

It is not an unprimeable number, because it can be changed into a prime (204130305721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34021717551 + ... + 34021717556.

It is an arithmetic number, because the mean of its divisors is an integer number (68043435108).

Almost surely, 2^204130305321 is an apocalyptic number.

It is an amenable number.

204130305321 is a deficient number, since it is larger than the sum of its proper divisors (68043435111).

204130305321 is an equidigital number, since it uses as much as digits as its factorization.

204130305321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68043435110.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 204130305321 its reverse (123503031402), we get a palindrome (327633336723).

The spelling of 204130305321 in words is "two hundred four billion, one hundred thirty million, three hundred five thousand, three hundred twenty-one".