204034313221 has 2 divisors, whose sum is σ = 204034313222. Its totient is φ = 204034313220.

The previous prime is 204034313207. The next prime is 204034313257. The reversal of 204034313221 is 122313430402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165942984321 + 38091328900 = 407361^2 + 195170^2 .

It is a cyclic number.

It is not a de Polignac number, because 204034313221 - 2⁹ = 204034312709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204034313201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102017156610 + 102017156611.

It is an arithmetic number, because the mean of its divisors is an integer number (102017156611).

Almost surely, 2^204034313221 is an apocalyptic number.

It is an amenable number.

204034313221 is a deficient number, since it is larger than the sum of its proper divisors (1).

204034313221 is an equidigital number, since it uses as much as digits as its factorization.

204034313221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 204034313221 its reverse (122313430402), we get a palindrome (326347743623).

The spelling of 204034313221 in words is "two hundred four billion, thirty-four million, three hundred thirteen thousand, two hundred twenty-one".