422444213021 has 4 divisors (see below), whose sum is σ = 422446693500. Its totient is φ = 422441732544.

The previous prime is 422444213017. The next prime is 422444213027. The reversal of 422444213021 is 120312444224.

It is a happy number.

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 273246652900 + 149197560121 = 522730^2 + 386261^2 .

It is a cyclic number.

It is not a de Polignac number, because 422444213021 - 2² = 422444213017 is a prime.

It is a super-2 number, since 2×422444213021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422444213027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 964316 + ... + 1332213.

It is an arithmetic number, because the mean of its divisors is an integer number (105611673375).

Almost surely, 2^422444213021 is an apocalyptic number.

It is an amenable number.

422444213021 is a deficient number, since it is larger than the sum of its proper divisors (2480479).

422444213021 is a wasteful number, since it uses less digits than its factorization.

422444213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480478.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 422444213021 its reverse (120312444224), we get a palindrome (542756657245).

The spelling of 422444213021 in words is "four hundred twenty-two billion, four hundred forty-four million, two hundred thirteen thousand, twenty-one".