22122211222 has 4 divisors (see below), whose sum is σ = 33183316836. Its totient is φ = 11061105610.

The previous prime is 22122211217. The next prime is 22122211249. The reversal of 22122211222 is 22211222122.

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

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 22122211222.

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, 5530552804 + ... + 5530552807.

It is an arithmetic number, because the mean of its divisors is an integer number (8295829209).

Almost surely, 2^22122211222 is an apocalyptic number.

22122211222 is a deficient number, since it is larger than the sum of its proper divisors (11061105614).

22122211222 is a wasteful number, since it uses less digits than its factorization.

22122211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11061105613.

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

Adding to 22122211222 its reverse (22211222122), we get a palindrome (44333433344).

The spelling of 22122211222 in words is "twenty-two billion, one hundred twenty-two million, two hundred eleven thousand, two hundred twenty-two".