12112011222012 has 144 divisors (see below), whose sum is σ = 33055823979360. Its totient is φ = 3717262761984.

The previous prime is 12112011222011. The next prime is 12112011222079. The reversal of 12112011222012 is 21022211021121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112011222011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 317773068 + ... + 317811180.

It is an arithmetic number, because the mean of its divisors is an integer number (229554333190).

Almost surely, 2^{12112011222012} is an apocalyptic number.

12112011222012 is a gapful number since it is divisible by the number (12) 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 12112011222012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16527911989680).

12112011222012 is an abundant number, since it is smaller than the sum of its proper divisors (20943812757348).

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

12112011222012 is a wasteful number, since it uses less digits than its factorization.

12112011222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39852 (or 39847 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12112011222012 its reverse (21022211021121), we get a palindrome (33134222243133).

The spelling of 12112011222012 in words is "twelve trillion, one hundred twelve billion, eleven million, two hundred twenty-two thousand, twelve".