442220400021 has 8 divisors (see below), whose sum is σ = 589633964640. Its totient is φ = 294810217712.

The previous prime is 442220400001. The next prime is 442220400031. The reversal of 442220400021 is 120004022244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 442220400021 - 2⁷ = 442220399893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442220400001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522915 + ... + 1076048.

It is an arithmetic number, because the mean of its divisors is an integer number (73704245580).

Almost surely, 2^442220400021 is an apocalyptic number.

It is an amenable number.

442220400021 is a deficient number, since it is larger than the sum of its proper divisors (147413564619).

442220400021 is a wasteful number, since it uses less digits than its factorization.

442220400021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691155.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 442220400021 its reverse (120004022244), we get a palindrome (562224422265).

The spelling of 442220400021 in words is "four hundred forty-two billion, two hundred twenty million, four hundred thousand, twenty-one".