22021000009 has 16 divisors (see below), whose sum is σ = 23794744320. Its totient is φ = 20319583680.

The previous prime is 22020999991. The next prime is 22021000021. The reversal of 22021000009 is 90000012022.

It is a happy number.

It is not a de Polignac number, because 22021000009 - 2⁵ = 22020999977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22020999956 and 22021000001.

It is not an unprimeable number, because it can be changed into a prime (22021000039) 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, 177307 + ... + 274735.

It is an arithmetic number, because the mean of its divisors is an integer number (1487171520).

Almost surely, 2^22021000009 is an apocalyptic number.

It is an amenable number.

22021000009 is a deficient number, since it is larger than the sum of its proper divisors (1773744311).

22021000009 is a wasteful number, since it uses less digits than its factorization.

22021000009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97800.

The product of its (nonzero) digits is 72, while the sum is 16.

The spelling of 22021000009 in words is "twenty-two billion, twenty-one million, nine", and thus it is an aban number and an uban number.