12212121120112 has 40 divisors (see below), whose sum is σ = 24996214264400. Its totient is φ = 5763805558272.

The previous prime is 12212121120109. The next prime is 12212121120179. The reversal of 12212121120112 is 21102112121221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 12212121120112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72427437 + ... + 72595852.

It is an arithmetic number, because the mean of its divisors is an integer number (624905356610).

Almost surely, 2^{12212121120112} is an apocalyptic number.

It is an amenable number.

12212121120112 is an abundant number, since it is smaller than the sum of its proper divisors (12784093144288).

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

12212121120112 is a wasteful number, since it uses less digits than its factorization.

12212121120112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145023593 (or 145023587 counting only the distinct ones).

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

Adding to 12212121120112 its reverse (21102112121221), we get a palindrome (33314233241333).

The spelling of 12212121120112 in words is "twelve trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty thousand, one hundred twelve".