422323211021 has 4 divisors (see below), whose sum is σ = 422746806012. Its totient is φ = 421899616032.

The previous prime is 422323211003. The next prime is 422323211033. The reversal of 422323211021 is 120112323224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 161318706025 + 261004504996 = 401645^2 + 510886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422323211021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422323211081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211796000 + ... + 211797993.

It is an arithmetic number, because the mean of its divisors is an integer number (105686701503).

Almost surely, 2^422323211021 is an apocalyptic number.

It is an amenable number.

422323211021 is a deficient number, since it is larger than the sum of its proper divisors (423594991).

422323211021 is an equidigital number, since it uses as much as digits as its factorization.

422323211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423594990.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 422323211021 its reverse (120112323224), we get a palindrome (542435534245).

The spelling of 422323211021 in words is "four hundred twenty-two billion, three hundred twenty-three million, two hundred eleven thousand, twenty-one".