22221121222 has 16 divisors (see below), whose sum is σ = 34420073472. Its totient is φ = 10748037960.

The previous prime is 22221121171. The next prime is 22221121249. The reversal of 22221121222 is 22212112222.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 22221121222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97813 + ... + 232399.

It is an arithmetic number, because the mean of its divisors is an integer number (2151254592).

Almost surely, 2^22221121222 is an apocalyptic number.

22221121222 is a deficient number, since it is larger than the sum of its proper divisors (12198952250).

22221121222 is a wasteful number, since it uses less digits than its factorization.

22221121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137283.

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

Adding to 22221121222 its reverse (22212112222), we get a palindrome (44433233444).

The spelling of 22221121222 in words is "twenty-two billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-two".