1212112122112 has 72 divisors (see below), whose sum is σ = 2634653044800. Its totient is φ = 554359744512.

The previous prime is 1212112122097. The next prime is 1212112122113. The reversal of 1212112122112 is 2112212112121.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1212112122112.

It is not an unprimeable number, because it can be changed into a prime (1212112122113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4155508 + ... + 4437619.

It is an arithmetic number, because the mean of its divisors is an integer number (36592403400).

Almost surely, 2^{1212112122112} is an apocalyptic number.

It is an amenable number.

1212112122112 is an abundant number, since it is smaller than the sum of its proper divisors (1422540922688).

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

1212112122112 is an equidigital number, since it uses as much as digits as its factorization.

1212112122112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8593191 (or 8593177 counting only the distinct ones).

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

Adding to 1212112122112 its reverse (2112212112121), we get a palindrome (3324324234233).

Subtracting 1212112122112 from its reverse (2112212112121), we obtain a palindrome (900099990009).

The spelling of 1212112122112 in words is "one trillion, two hundred twelve billion, one hundred twelve million, one hundred twenty-two thousand, one hundred twelve".