12112312012 has 48 divisors (see below), whose sum is σ = 21828102912. Its totient is φ = 5878702080.

The previous prime is 12112311979. The next prime is 12112312013. The reversal of 12112312012 is 21021321121.

It is not an unprimeable number, because it can be changed into a prime (12112312013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14034693 + ... + 14035555.

It is an arithmetic number, because the mean of its divisors is an integer number (454752144).

Almost surely, 2^12112312012 is an apocalyptic number.

It is an amenable number.

12112312012 is a deficient number, since it is larger than the sum of its proper divisors (9715790900).

12112312012 is a wasteful number, since it uses less digits than its factorization.

12112312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 1616 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12112312012 its reverse (21021321121), we get a palindrome (33133633133).

The spelling of 12112312012 in words is "twelve billion, one hundred twelve million, three hundred twelve thousand, twelve".