12112011100 has 108 divisors (see below), whose sum is σ = 30809199960. Its totient is φ = 4120771200.

The previous prime is 12112011089. The next prime is 12112011137. The reversal of 12112011100 is 111021121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 632466 + ... + 651334.

It is an arithmetic number, because the mean of its divisors is an integer number (285270370).

Almost surely, 2^12112011100 is an apocalyptic number.

12112011100 is a gapful number since it is divisible by the number (10) 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 12112011100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15404599980).

12112011100 is an abundant number, since it is smaller than the sum of its proper divisors (18697188860).

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

12112011100 is a wasteful number, since it uses less digits than its factorization.

12112011100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19028 (or 19014 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12112011100 its reverse (111021121), we get a palindrome (12223032221).

The spelling of 12112011100 in words is "twelve billion, one hundred twelve million, eleven thousand, one hundred".