324443220021 has 12 divisors (see below), whose sum is σ = 469078611820. Its totient is φ = 216093139200.

The previous prime is 324443220019. The next prime is 324443220043. The reversal of 324443220021 is 120022344423.

324443220021 is a `hidden beast` number, since 3 + 2 + 4 + 4 + 432 + 200 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 50510315025 + 273932904996 = 224745^2 + 523386^2 .

It is not a de Polignac number, because 324443220021 - 2¹ = 324443220019 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 (324443220721) 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, 16851580 + ... + 16870821.

Almost surely, 2^324443220021 is an apocalyptic number.

It is an amenable number.

324443220021 is a deficient number, since it is larger than the sum of its proper divisors (144635391799).

324443220021 is a wasteful number, since it uses less digits than its factorization.

324443220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33723476 (or 33723473 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 324443220021 its reverse (120022344423), we get a palindrome (444465564444).

The spelling of 324443220021 in words is "three hundred twenty-four billion, four hundred forty-three million, two hundred twenty thousand, twenty-one".