22212112220 has 24 divisors (see below), whose sum is σ = 46924756704. Its totient is φ = 8831640896.

The previous prime is 22212112217. The next prime is 22212112267. The reversal of 22212112220 is 2221121222.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3321827 + ... + 3328506.

It is an arithmetic number, because the mean of its divisors is an integer number (1955198196).

Almost surely, 2^22212112220 is an apocalyptic number.

22212112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22212112220 is an abundant number, since it is smaller than the sum of its proper divisors (24712644484).

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

22212112220 is a wasteful number, since it uses less digits than its factorization.

22212112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6650509 (or 6650507 counting only the distinct ones).

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

Adding to 22212112220 its reverse (2221121222), we get a palindrome (24433233442).

The spelling of 22212112220 in words is "twenty-two billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty".