12222222120 has 96 divisors (see below), whose sum is σ = 39766521600. Its totient is φ = 3255624576.

The previous prime is 12222222119. The next prime is 12222222191. The reversal of 12222222120 is 2122222221.

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 = 12222222093 and 12222222102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 312369 + ... + 349311.

It is an arithmetic number, because the mean of its divisors is an integer number (414234600).

Almost surely, 2^12222222120 is an apocalyptic number.

12222222120 is a gapful number since it is divisible by the number (10) 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 12222222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19883260800).

12222222120 is an abundant number, since it is smaller than the sum of its proper divisors (27544299480).

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

12222222120 is a wasteful number, since it uses less digits than its factorization.

12222222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37879 (or 37872 counting only the distinct ones).

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

Adding to 12222222120 its reverse (2122222221), we get a palindrome (14344444341).

The spelling of 12222222120 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty".