204021320441 has 2 divisors, whose sum is σ = 204021320442. Its totient is φ = 204021320440.

The previous prime is 204021320429. The next prime is 204021320479. The reversal of 204021320441 is 144023120402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177827516416 + 26193804025 = 421696^2 + 161845^2 .

It is a cyclic number.

It is not a de Polignac number, because 204021320441 - 2²⁶ = 203954211577 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 (204021320411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102010660220 + 102010660221.

It is an arithmetic number, because the mean of its divisors is an integer number (102010660221).

Almost surely, 2^204021320441 is an apocalyptic number.

It is an amenable number.

204021320441 is a deficient number, since it is larger than the sum of its proper divisors (1).

204021320441 is an equidigital number, since it uses as much as digits as its factorization.

204021320441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 204021320441 its reverse (144023120402), we get a palindrome (348044440843).

The spelling of 204021320441 in words is "two hundred four billion, twenty-one million, three hundred twenty thousand, four hundred forty-one".