442320412021 has 2 divisors, whose sum is σ = 442320412022. Its totient is φ = 442320412020.

The previous prime is 442320411989. The next prime is 442320412031. The reversal of 442320412021 is 120214023244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 440988964900 + 1331447121 = 664070^2 + 36489^2 .

It is a cyclic number.

It is not a de Polignac number, because 442320412021 - 2⁵ = 442320411989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442320412031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221160206010 + 221160206011.

It is an arithmetic number, because the mean of its divisors is an integer number (221160206011).

Almost surely, 2^442320412021 is an apocalyptic number.

It is an amenable number.

442320412021 is a deficient number, since it is larger than the sum of its proper divisors (1).

442320412021 is an equidigital number, since it uses as much as digits as its factorization.

442320412021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 442320412021 its reverse (120214023244), we get a palindrome (562534435265).

The spelling of 442320412021 in words is "four hundred forty-two billion, three hundred twenty million, four hundred twelve thousand, twenty-one".