22221101222 has 4 divisors (see below), whose sum is σ = 33331651836. Its totient is φ = 11110550610.

The previous prime is 22221101171. The next prime is 22221101249. The reversal of 22221101222 is 22210112222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 22221101222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555275304 + ... + 5555275307.

It is an arithmetic number, because the mean of its divisors is an integer number (8332912959).

Almost surely, 2^22221101222 is an apocalyptic number.

22221101222 is a deficient number, since it is larger than the sum of its proper divisors (11110550614).

22221101222 is a wasteful number, since it uses less digits than its factorization.

22221101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110550613.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22221101222 its reverse (22210112222), we get a palindrome (44431213444).

The spelling of 22221101222 in words is "twenty-two billion, two hundred twenty-one million, one hundred one thousand, two hundred twenty-two".