204034034342321 has 2 divisors, whose sum is σ = 204034034342322. Its totient is φ = 204034034342320.

The previous prime is 204034034342239. The next prime is 204034034342389. The reversal of 204034034342321 is 123243430430402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193713646791025 + 10320387551296 = 13918105^2 + 3212536^2 .

It is a cyclic number.

It is not a de Polignac number, because 204034034342321 - 2²² = 204034030148017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (204034034347321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102017017171160 + 102017017171161.

It is an arithmetic number, because the mean of its divisors is an integer number (102017017171161).

Almost surely, 2^{204034034342321} is an apocalyptic number.

It is an amenable number.

204034034342321 is a deficient number, since it is larger than the sum of its proper divisors (1).

204034034342321 is an equidigital number, since it uses as much as digits as its factorization.

204034034342321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 35.

Adding to 204034034342321 its reverse (123243430430402), we get a palindrome (327277464772723).

The spelling of 204034034342321 in words is "two hundred four trillion, thirty-four billion, thirty-four million, three hundred forty-two thousand, three hundred twenty-one".