12111222211120 has 160 divisors (see below), whose sum is σ = 28987736094720. Its totient is φ = 4703616906240.

The previous prime is 12111222211091. The next prime is 12111222211141. The reversal of 12111222211120 is 2111222211121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283328469 + ... + 283371211.

It is an arithmetic number, because the mean of its divisors is an integer number (181173350592).

Almost surely, 2^{12111222211120} is an apocalyptic number.

12111222211120 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 12111222211120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14493868047360).

12111222211120 is an abundant number, since it is smaller than the sum of its proper divisors (16876513883600).

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

12111222211120 is a wasteful number, since it uses less digits than its factorization.

12111222211120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43403 (or 43397 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12111222211120 its reverse (2111222211121), we get a palindrome (14222444422241).

Subtracting from 12111222211120 its reverse (2111222211121), we obtain a palindrome (9999999999999).

The spelling of 12111222211120 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-two million, two hundred eleven thousand, one hundred twenty".