4422420021 has 16 divisors (see below), whose sum is σ = 6037574400. Its totient is φ = 2878097088.

The previous prime is 4422420017. The next prime is 4422420053. The reversal of 4422420021 is 1200242244.

It is not a de Polignac number, because 4422420021 - 2² = 4422420017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4422420021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4422420091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14535 + ... + 95163.

It is an arithmetic number, because the mean of its divisors is an integer number (377348400).

Almost surely, 2^4422420021 is an apocalyptic number.

It is an amenable number.

4422420021 is a deficient number, since it is larger than the sum of its proper divisors (1615154379).

4422420021 is a wasteful number, since it uses less digits than its factorization.

4422420021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81068.

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

The square root of 4422420021 is about 66501.2783410966. The cubic root of 4422420021 is about 1641.4210394251.

Adding to 4422420021 its reverse (1200242244), we get a palindrome (5622662265).

The spelling of 4422420021 in words is "four billion, four hundred twenty-two million, four hundred twenty thousand, twenty-one".