204034420412021 has 2 divisors, whose sum is σ = 204034420412022. Its totient is φ = 204034420412020.

The previous prime is 204034420411999. The next prime is 204034420412089. The reversal of 204034420412021 is 120214024430402.

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., 126812260599025 + 77222159812996 = 11261095^2 + 8787614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204034420412021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204034420412321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102017210206010 + 102017210206011.

It is an arithmetic number, because the mean of its divisors is an integer number (102017210206011).

Almost surely, 2^{204034420412021} is an apocalyptic number.

It is an amenable number.

204034420412021 is a deficient number, since it is larger than the sum of its proper divisors (1).

204034420412021 is an equidigital number, since it uses as much as digits as its factorization.

204034420412021 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 29.

Adding to 204034420412021 its reverse (120214024430402), we get a palindrome (324248444842423).

The spelling of 204034420412021 in words is "two hundred four trillion, thirty-four billion, four hundred twenty million, four hundred twelve thousand, twenty-one".