22021222120 has 64 divisors (see below), whose sum is σ = 51786864000. Its totient is φ = 8411682048.

The previous prime is 22021222109. The next prime is 22021222159. The reversal of 22021222120 is 2122212022.

It is a junction number, because it is equal to n+sod(n) for n = 22021222094 and 22021222103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550146 + ... + 588814.

It is an arithmetic number, because the mean of its divisors is an integer number (809169750).

Almost surely, 2^22021222120 is an apocalyptic number.

22021222120 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 22021222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25893432000).

22021222120 is an abundant number, since it is smaller than the sum of its proper divisors (29765641880).

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

22021222120 is a wasteful number, since it uses less digits than its factorization.

22021222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39322 (or 39318 counting only the distinct ones).

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

Adding to 22021222120 its reverse (2122212022), we get a palindrome (24143434142).

The spelling of 22021222120 in words is "twenty-two billion, twenty-one million, two hundred twenty-two thousand, one hundred twenty".