12031210112 has 128 divisors (see below), whose sum is σ = 25592371200. Its totient is φ = 5624478720.

The previous prime is 12031210111. The next prime is 12031210129. The reversal of 12031210112 is 21101213021.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (12031210111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18256439 + ... + 18257097.

It is an arithmetic number, because the mean of its divisors is an integer number (199940400).

Almost surely, 2^12031210112 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 12031210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12796185600).

12031210112 is an abundant number, since it is smaller than the sum of its proper divisors (13561161088).

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

12031210112 is a wasteful number, since it uses less digits than its factorization.

12031210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854 (or 842 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12031210112 its reverse (21101213021), we get a palindrome (33132423133).

The spelling of 12031210112 in words is "twelve billion, thirty-one million, two hundred ten thousand, one hundred twelve".