222100000221 has 16 divisors (see below), whose sum is σ = 323067251520. Its totient is φ = 134600766720.

The previous prime is 222100000217. The next prime is 222100000237. The reversal of 222100000221 is 122000001222.

It is not a de Polignac number, because 222100000221 - 2² = 222100000217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222100000197 and 222100000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222100000201) 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, 822165 + ... + 1058373.

It is an arithmetic number, because the mean of its divisors is an integer number (20191703220).

Almost surely, 2^222100000221 is an apocalyptic number.

It is an amenable number.

222100000221 is a deficient number, since it is larger than the sum of its proper divisors (100967251299).

222100000221 is a wasteful number, since it uses less digits than its factorization.

222100000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264716.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 222100000221 its reverse (122000001222), we get a palindrome (344100001443).

The spelling of 222100000221 in words is "two hundred twenty-two billion, one hundred million, two hundred twenty-one", and thus it is an aban number.