22111221209 has 64 divisors (see below), whose sum is σ = 28722677760. Its totient is φ = 16526315520.

The previous prime is 22111221161. The next prime is 22111221217. The reversal of 22111221209 is 90212211122.

It is not a de Polignac number, because 22111221209 - 2⁸ = 22111220953 is a prime.

It is a super-2 number, since 2×22111221209² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22111221259) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52771202 + ... + 52771620.

It is an arithmetic number, because the mean of its divisors is an integer number (448791840).

Almost surely, 2^22111221209 is an apocalyptic number.

It is an amenable number.

22111221209 is a deficient number, since it is larger than the sum of its proper divisors (6611456551).

22111221209 is a wasteful number, since it uses less digits than its factorization.

22111221209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 22111221209 in words is "twenty-two billion, one hundred eleven million, two hundred twenty-one thousand, two hundred nine".