423441322021 has 2 divisors, whose sum is σ = 423441322022. Its totient is φ = 423441322020.

The previous prime is 423441322019. The next prime is 423441322061. The reversal of 423441322021 is 120223144324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 278531673121 + 144909648900 = 527761^2 + 380670^2 .

It is a cyclic number.

It is not a de Polignac number, because 423441322021 - 2¹ = 423441322019 is a prime.

Together with 423441322019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423441322061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211720661010 + 211720661011.

It is an arithmetic number, because the mean of its divisors is an integer number (211720661011).

Almost surely, 2^423441322021 is an apocalyptic number.

It is an amenable number.

423441322021 is a deficient number, since it is larger than the sum of its proper divisors (1).

423441322021 is an equidigital number, since it uses as much as digits as its factorization.

423441322021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 423441322021 its reverse (120223144324), we get a palindrome (543664466345).

The spelling of 423441322021 in words is "four hundred twenty-three billion, four hundred forty-one million, three hundred twenty-two thousand, twenty-one".