12031310312 has 64 divisors (see below), whose sum is σ = 27395003520. Its totient is φ = 4835708928.

The previous prime is 12031310311. The next prime is 12031310351. The reversal of 12031310312 is 21301313021.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (12031310311) 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, 247088 + ... + 291744.

It is an arithmetic number, because the mean of its divisors is an integer number (428046930).

Almost surely, 2^12031310312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12031310312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13697501760).

12031310312 is an abundant number, since it is smaller than the sum of its proper divisors (15363693208).

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

12031310312 is a wasteful number, since it uses less digits than its factorization.

12031310312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44970 (or 44966 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12031310312 its reverse (21301313021), we get a palindrome (33332623333).

The spelling of 12031310312 in words is "twelve billion, thirty-one million, three hundred ten thousand, three hundred twelve".