12311112312 has 48 divisors (see below), whose sum is σ = 34155838080. Its totient is φ = 4003612800.

The previous prime is 12311112259. The next prime is 12311112329. The reversal of 12311112312 is 21321111321.

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

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2082264 + ... + 2088167.

It is an arithmetic number, because the mean of its divisors is an integer number (711579960).

Almost surely, 2^12311112312 is an apocalyptic number.

12311112312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12311112312 is an abundant number, since it is smaller than the sum of its proper divisors (21844725768).

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

12311112312 is a wasteful number, since it uses less digits than its factorization.

12311112312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170484 (or 4170477 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 12311112312 its reverse (21321111321), we get a palindrome (33632223633).

Subtracting 12311112312 from its reverse (21321111321), we obtain a palindrome (9009999009).

The spelling of 12311112312 in words is "twelve billion, three hundred eleven million, one hundred twelve thousand, three hundred twelve".