222121100209 has 16 divisors (see below), whose sum is σ = 223910668800. Its totient is φ = 220341106944.

The previous prime is 222121100119. The next prime is 222121100213. The reversal of 222121100209 is 902001121222.

It is a cyclic number.

It is not a de Polignac number, because 222121100209 - 2⁷ = 222121100081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222121100209.

It is not an unprimeable number, because it can be changed into a prime (222121100239) 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, 66125472 + ... + 66128830.

It is an arithmetic number, because the mean of its divisors is an integer number (13994416800).

Almost surely, 2^222121100209 is an apocalyptic number.

It is an amenable number.

222121100209 is a deficient number, since it is larger than the sum of its proper divisors (1789568591).

222121100209 is a wasteful number, since it uses less digits than its factorization.

222121100209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4632.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 222121100209 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred thousand, two hundred nine".