22200021221 has 8 divisors (see below), whose sum is σ = 25410672000. Its totient is φ = 18999175248.

The previous prime is 22200021203. The next prime is 22200021223. The reversal of 22200021221 is 12212000222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22200021221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22200021196 and 22200021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200021223) 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, 2446346 + ... + 2455403.

It is an arithmetic number, because the mean of its divisors is an integer number (3176334000).

Almost surely, 2^22200021221 is an apocalyptic number.

It is an amenable number.

22200021221 is a deficient number, since it is larger than the sum of its proper divisors (3210650779).

22200021221 is an equidigital number, since it uses as much as digits as its factorization.

22200021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4902403.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22200021221 its reverse (12212000222), we get a palindrome (34412021443).

The spelling of 22200021221 in words is "twenty-two billion, two hundred million, twenty-one thousand, two hundred twenty-one".