22222120000 has 140 divisors (see below), whose sum is σ = 57006736380. Its totient is φ = 8581888000.

The previous prime is 22222119973. The next prime is 22222120031. The reversal of 22222120000 is 2122222.

It can be written as a sum of positive squares in 10 ways, for example, as 21273972736 + 948147264 = 145856^2 + 30792^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1150422 + ... + 1169578.

Almost surely, 2^22222120000 is an apocalyptic number.

22222120000 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 22222120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28503368190).

22222120000 is an abundant number, since it is smaller than the sum of its proper divisors (34784616380).

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

22222120000 is an equidigital number, since it uses as much as digits as its factorization.

22222120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19218 (or 19193 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 22222120000 its reverse (2122222), we get a palindrome (22224242222).

The spelling of 22222120000 in words is "twenty-two billion, two hundred twenty-two million, one hundred twenty thousand".