42444312022021 has 12 divisors (see below), whose sum is σ = 53171995281132. Its totient is φ = 33582312808128.

The previous prime is 42444312022009. The next prime is 42444312022039. The reversal of 42444312022021 is 12022021344424.

It can be written as a sum of positive squares in 2 ways, for example, as 24763422353796 + 17680889668225 = 4976286^2 + 4204865^2 .

It is not a de Polignac number, because 42444312022021 - 2⁴⁵ = 7259939933189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42444312022621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33315785880 + ... + 33315787153.

It is an arithmetic number, because the mean of its divisors is an integer number (4430999606761).

Almost surely, 2^{42444312022021} is an apocalyptic number.

It is an amenable number.

42444312022021 is a deficient number, since it is larger than the sum of its proper divisors (10727683259111).

42444312022021 is a wasteful number, since it uses less digits than its factorization.

42444312022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66631573060 (or 66631573053 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 42444312022021 its reverse (12022021344424), we get a palindrome (54466333366445).

The spelling of 42444312022021 in words is "forty-two trillion, four hundred forty-four billion, three hundred twelve million, twenty-two thousand, twenty-one".