22010000021 has 8 divisors (see below), whose sum is σ = 22344906624. Its totient is φ = 21675281760.

The previous prime is 22010000003. The next prime is 22010000099. The reversal of 22010000021 is 12000001022.

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 22010000021 - 2³⁰ = 20936258197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22009999963 and 22010000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22010000821) 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, 198041 + ... + 288513.

It is an arithmetic number, because the mean of its divisors is an integer number (2793113328).

Almost surely, 2^22010000021 is an apocalyptic number.

It is an amenable number.

22010000021 is a deficient number, since it is larger than the sum of its proper divisors (334906603).

22010000021 is an equidigital number, since it uses as much as digits as its factorization.

22010000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94171.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 22010000021 its reverse (12000001022), we get a palindrome (34010001043).

The spelling of 22010000021 in words is "twenty-two billion, ten million, twenty-one", and thus it is an aban number and an uban number.