441220400021 has 4 divisors (see below), whose sum is σ = 441228893952. Its totient is φ = 441211906092.

The previous prime is 441220400017. The next prime is 441220400041. The reversal of 441220400021 is 120004022144.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 441220400021 - 2² = 441220400017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 441220399966 and 441220400002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441220400041) 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, 4168565 + ... + 4273098.

It is an arithmetic number, because the mean of its divisors is an integer number (110307223488).

Almost surely, 2^441220400021 is an apocalyptic number.

It is an amenable number.

441220400021 is a deficient number, since it is larger than the sum of its proper divisors (8493931).

441220400021 is an equidigital number, since it uses as much as digits as its factorization.

441220400021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8493930.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 441220400021 its reverse (120004022144), we get a palindrome (561224422165).

The spelling of 441220400021 in words is "four hundred forty-one billion, two hundred twenty million, four hundred thousand, twenty-one".