443441220021 has 12 divisors (see below), whose sum is σ = 640678152972. Its totient is φ = 295557350976.

The previous prime is 443441219981. The next prime is 443441220023. The reversal of 443441220021 is 120022144344.

443441220021 is a `hidden beast` number, since 4 + 43 + 4 + 412 + 200 + 2 + 1 = 666.

443441220021 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 422384307921 + 21056912100 = 649911^2 + 145110^2 .

It is not a de Polignac number, because 443441220021 - 2¹⁵ = 443441187253 is a prime.

It is a super-2 number, since 2×443441220021² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443441220023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5804026 + ... + 5879931.

It is an arithmetic number, because the mean of its divisors is an integer number (53389846081).

Almost surely, 2^443441220021 is an apocalyptic number.

It is an amenable number.

443441220021 is a deficient number, since it is larger than the sum of its proper divisors (197236932951).

443441220021 is a wasteful number, since it uses less digits than its factorization.

443441220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11688180 (or 11688177 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 443441220021 its reverse (120022144344), we get a palindrome (563463364365).

The spelling of 443441220021 in words is "four hundred forty-three billion, four hundred forty-one million, two hundred twenty thousand, twenty-one".