323434420021 has 2 divisors, whose sum is σ = 323434420022. Its totient is φ = 323434420020.

The previous prime is 323434419983. The next prime is 323434420033. The reversal of 323434420021 is 120024434323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284714019396 + 38720400625 = 533586^2 + 196775^2 .

It is a cyclic number.

It is not a de Polignac number, because 323434420021 - 2⁹ = 323434419509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (323434420061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161717210010 + 161717210011.

It is an arithmetic number, because the mean of its divisors is an integer number (161717210011).

Almost surely, 2^323434420021 is an apocalyptic number.

It is an amenable number.

323434420021 is a deficient number, since it is larger than the sum of its proper divisors (1).

323434420021 is an equidigital number, since it uses as much as digits as its factorization.

323434420021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 323434420021 its reverse (120024434323), we get a palindrome (443458854344).

The spelling of 323434420021 in words is "three hundred twenty-three billion, four hundred thirty-four million, four hundred twenty thousand, twenty-one".