12112212112 has 320 divisors, whose sum is σ = 33837834240. Its totient is φ = 4043520000.

The previous prime is 12112212109. The next prime is 12112212191. The reversal of 12112212112 is 21121221121.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16127737 + ... + 16128487.

It is an arithmetic number, because the mean of its divisors is an integer number (105743232).

Almost surely, 2^12112212112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12112212112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16918917120).

12112212112 is an abundant number, since it is smaller than the sum of its proper divisors (21725622128).

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

12112212112 is a wasteful number, since it uses less digits than its factorization.

12112212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862 (or 856 counting only the distinct ones).

The product of its digits is 32, while the sum is 16.

Adding to 12112212112 its reverse (21121221121), we get a palindrome (33233433233).

Subtracting 12112212112 from its reverse (21121221121), we obtain a palindrome (9009009009).

The spelling of 12112212112 in words is "twelve billion, one hundred twelve million, two hundred twelve thousand, one hundred twelve".