22122111222 has 12 divisors (see below), whose sum is σ = 47931241020. Its totient is φ = 7374037068.

The previous prime is 22122111211. The next prime is 22122111227. The reversal of 22122111222 is 22211122122.

It is a happy number.

22122111222 is a `hidden beast` number, since 221 + 221 + 1 + 1 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1229006179 = 22122111222 / (2 + 2 + 1 + 2 + 2 + 1 + 1 + 1 + 2 + 2 + 2).

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

It is a junction number, because it is equal to n+sod(n) for n = 22122111195 and 22122111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122111227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 614503072 + ... + 614503107.

It is an arithmetic number, because the mean of its divisors is an integer number (3994270085).

Almost surely, 2^22122111222 is an apocalyptic number.

22122111222 is an abundant number, since it is smaller than the sum of its proper divisors (25809129798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22122111222 is a wasteful number, since it uses less digits than its factorization.

22122111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229006187 (or 1229006184 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

Adding to 22122111222 its reverse (22211122122), we get a palindrome (44333233344).

The spelling of 22122111222 in words is "twenty-two billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twenty-two".