204133322220221 has 2 divisors, whose sum is σ = 204133322220222. Its totient is φ = 204133322220220.

The previous prime is 204133322220193. The next prime is 204133322220251. The reversal of 204133322220221 is 122022223331402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198694002124996 + 5439320095225 = 14095886^2 + 2332235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204133322220221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204133322220251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102066661110110 + 102066661110111.

It is an arithmetic number, because the mean of its divisors is an integer number (102066661110111).

Almost surely, 2^{204133322220221} is an apocalyptic number.

It is an amenable number.

204133322220221 is a deficient number, since it is larger than the sum of its proper divisors (1).

204133322220221 is an equidigital number, since it uses as much as digits as its factorization.

204133322220221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 204133322220221 its reverse (122022223331402), we get a palindrome (326155545551623).

The spelling of 204133322220221 in words is "two hundred four trillion, one hundred thirty-three billion, three hundred twenty-two million, two hundred twenty thousand, two hundred twenty-one".