11121212112 has 80 divisors (see below), whose sum is σ = 28931481600. Its totient is φ = 3681127296.

The previous prime is 11121211987. The next prime is 11121212153. The reversal of 11121212112 is 21121212111.

It is a happy number.

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 junction number, because it is equal to n+sod(n) for n = 11121212091 and 11121212100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7096353 + ... + 7097919.

It is an arithmetic number, because the mean of its divisors is an integer number (361643520).

Almost surely, 2^11121212112 is an apocalyptic number.

11121212112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11121212112 is an abundant number, since it is smaller than the sum of its proper divisors (17810269488).

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

11121212112 is a wasteful number, since it uses less digits than its factorization.

11121212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520 (or 2514 counting only the distinct ones).

The product of its digits is 16, while the sum is 15.

Adding to 11121212112 its reverse (21121212111), we get a palindrome (32242424223).

Subtracting 11121212112 from its reverse (21121212111), we obtain a palindrome (9999999999).

The spelling of 11121212112 in words is "eleven billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twelve".