12112121208 has 64 divisors (see below), whose sum is σ = 34172150400. Its totient is φ = 3543774080.

The previous prime is 12112121201. The next prime is 12112121221. The reversal of 12112121208 is 80212121121.

12112121208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112121201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 783366 + ... + 798677.

It is an arithmetic number, because the mean of its divisors is an integer number (533939850).

Almost surely, 2^12112121208 is an apocalyptic number.

It is an amenable number.

12112121208 is an abundant number, since it is smaller than the sum of its proper divisors (22060029192).

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

12112121208 is a wasteful number, since it uses less digits than its factorization.

12112121208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582092 (or 1582088 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 12112121208 its reverse (80212121121), we get a palindrome (92324242329).

The spelling of 12112121208 in words is "twelve billion, one hundred twelve million, one hundred twenty-one thousand, two hundred eight".