204224324221 has 2 divisors, whose sum is σ = 204224324222. Its totient is φ = 204224324220.

The previous prime is 204224324203. The next prime is 204224324273. The reversal of 204224324221 is 122423422402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200269675225 + 3954648996 = 447515^2 + 62886^2 .

It is a cyclic number.

It is not a de Polignac number, because 204224324221 - 2¹³ = 204224316029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204224324221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204224324021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102112162110 + 102112162111.

It is an arithmetic number, because the mean of its divisors is an integer number (102112162111).

Almost surely, 2^204224324221 is an apocalyptic number.

It is an amenable number.

204224324221 is a deficient number, since it is larger than the sum of its proper divisors (1).

204224324221 is an equidigital number, since it uses as much as digits as its factorization.

204224324221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 204224324221 its reverse (122423422402), we get a palindrome (326647746623).

The spelling of 204224324221 in words is "two hundred four billion, two hundred twenty-four million, three hundred twenty-four thousand, two hundred twenty-one".