22122120222 has 64 divisors (see below), whose sum is σ = 51337820160. Its totient is φ = 7047909792.

The previous prime is 22122120197. The next prime is 22122120271. The reversal of 22122120222 is 22202122122.

22122120222 is a `hidden beast` number, since 221 + 221 + 2 + 0 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 22122120195 and 22122120204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1761108 + ... + 1773624.

It is an arithmetic number, because the mean of its divisors is an integer number (802153440).

Almost surely, 2^22122120222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22122120222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25668910080).

22122120222 is an abundant number, since it is smaller than the sum of its proper divisors (29215699938).

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

22122120222 is a wasteful number, since it uses less digits than its factorization.

22122120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13974 (or 13968 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22122120222 its reverse (22202122122), we get a palindrome (44324242344).

The spelling of 22122120222 in words is "twenty-two billion, one hundred twenty-two million, one hundred twenty thousand, two hundred twenty-two".