204242613321 has 4 divisors (see below), whose sum is σ = 272323484432. Its totient is φ = 136161742212.

The previous prime is 204242613319. The next prime is 204242613349. The reversal of 204242613321 is 123316242402.

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 not a de Polignac number, because 204242613321 - 2¹ = 204242613319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204242613301) 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, 34040435551 + ... + 34040435556.

It is an arithmetic number, because the mean of its divisors is an integer number (68080871108).

Almost surely, 2^204242613321 is an apocalyptic number.

It is an amenable number.

204242613321 is a deficient number, since it is larger than the sum of its proper divisors (68080871111).

204242613321 is an equidigital number, since it uses as much as digits as its factorization.

204242613321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68080871110.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 204242613321 its reverse (123316242402), we get a palindrome (327558855723).

The spelling of 204242613321 in words is "two hundred four billion, two hundred forty-two million, six hundred thirteen thousand, three hundred twenty-one".