12222112120000 has 140 divisors (see below), whose sum is σ = 30690505019680. Its totient is φ = 4826959488000.

The previous prime is 12222112119977. The next prime is 12222112120003. The reversal of 12222112120000 is 2121122221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (12222112120003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1226122 + ... + 5093878.

Almost surely, 2^{12222112120000} is an apocalyptic number.

12222112120000 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 12222112120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15345252509840).

12222112120000 is an abundant number, since it is smaller than the sum of its proper divisors (18468392899680).

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

12222112120000 is an frugal number, since it uses more digits than its factorization.

12222112120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867868 (or 3867843 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12222112120000 its reverse (2121122221), we get a palindrome (12224233242221).

The spelling of 12222112120000 in words is "twelve trillion, two hundred twenty-two billion, one hundred twelve million, one hundred twenty thousand".