22122012220 has 96 divisors (see below), whose sum is σ = 58129666560. Its totient is φ = 6870147840.

The previous prime is 22122012173. The next prime is 22122012281. The reversal of 22122012220 is 2221022122.

It is a junction number, because it is equal to n+sod(n) for n = 22122012194 and 22122012203.

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 in 31 ways as a sum of consecutive naturals, for example, 400651 + ... + 452509.

It is an arithmetic number, because the mean of its divisors is an integer number (605517360).

Almost surely, 2^22122012220 is an apocalyptic number.

22122012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22122012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29064833280).

22122012220 is an abundant number, since it is smaller than the sum of its proper divisors (36007654340).

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

22122012220 is a wasteful number, since it uses less digits than its factorization.

22122012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52163 (or 52161 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22122012220 its reverse (2221022122), we get a palindrome (24343034342).

The spelling of 22122012220 in words is "twenty-two billion, one hundred twenty-two million, twelve thousand, two hundred twenty".