22211121222 has 48 divisors (see below), whose sum is σ = 48313409040. Its totient is φ = 7374638400.

The previous prime is 22211121193. The next prime is 22211121241. The reversal of 22211121222 is 22212111222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 = 22211121195 and 22211121204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6587197 + ... + 6590567.

It is an arithmetic number, because the mean of its divisors is an integer number (1006529355).

Almost surely, 2^22211121222 is an apocalyptic number.

22211121222 is an abundant number, since it is smaller than the sum of its proper divisors (26102287818).

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

22211121222 is a wasteful number, since it uses less digits than its factorization.

22211121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709 (or 4706 counting only the distinct ones).

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

Adding to 22211121222 its reverse (22212111222), we get a palindrome (44423232444).

The spelling of 22211121222 in words is "twenty-two billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty-two".