22120021009 has 8 divisors (see below), whose sum is σ = 22344233832. Its totient is φ = 21895910400.

The previous prime is 22120020973. The next prime is 22120021013. The reversal of 22120021009 is 90012002122.

It can be written as a sum of positive squares in 4 ways, for example, as 3936307600 + 18183713409 = 62740^2 + 134847^2 .

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 22120021009 - 2⁹ = 22120020497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22120021309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454897 + ... + 501169.

It is an arithmetic number, because the mean of its divisors is an integer number (2793029229).

Almost surely, 2^22120021009 is an apocalyptic number.

It is an amenable number.

22120021009 is a deficient number, since it is larger than the sum of its proper divisors (224212823).

22120021009 is a wasteful number, since it uses less digits than its factorization.

22120021009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51107.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 22120021009 in words is "twenty-two billion, one hundred twenty million, twenty-one thousand, nine".