12112111121212 has 12 divisors (see below), whose sum is σ = 21196301959840. Its totient is φ = 6056024846976.

The previous prime is 12112111121203. The next prime is 12112111121213. The reversal of 12112111121212 is 21212111121121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12112111121212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112111121213) 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 3 ways as a sum of consecutive naturals, for example, 6779412 + ... + 8377627.

Almost surely, 2^{12112111121212} is an apocalyptic number.

It is an amenable number.

12112111121212 is a deficient number, since it is larger than the sum of its proper divisors (9084190838628).

12112111121212 is a wasteful number, since it uses less digits than its factorization.

12112111121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15356820 (or 15356818 counting only the distinct ones).

The product of its digits is 32, while the sum is 19.

Adding to 12112111121212 its reverse (21212111121121), we get a palindrome (33324222242333).

Subtracting 12112111121212 from its reverse (21212111121121), we obtain a palindrome (9099999999909).

The spelling of 12112111121212 in words is "twelve trillion, one hundred twelve billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twelve".