22122221000221 has 8 divisors (see below), whose sum is σ = 22155303660984. Its totient is φ = 22089139537920.

The previous prime is 22122221000213. The next prime is 22122221000261. The reversal of 22122221000221 is 12200012222122.

It can be written as a sum of positive squares in 4 ways, for example, as 17092114016121 + 5030106984100 = 4134261^2 + 2242790^2 .

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 22122221000221 - 2³ = 22122221000213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122221000261) 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, 40866301 + ... + 41404093.

It is an arithmetic number, because the mean of its divisors is an integer number (2769412957623).

Almost surely, 2^{22122221000221} is an apocalyptic number.

It is an amenable number.

22122221000221 is a deficient number, since it is larger than the sum of its proper divisors (33082660763).

22122221000221 is an equidigital number, since it uses as much as digits as its factorization.

22122221000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599231.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22122221000221 its reverse (12200012222122), we get a palindrome (34322233222343).

The spelling of 22122221000221 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-one", and thus it is an aban number.