12031112011 has 4 divisors (see below), whose sum is σ = 12031335000. Its totient is φ = 12030889024.

The previous prime is 12031111987. The next prime is 12031112047. The reversal of 12031112011 is 11021113021.

It is a happy number.

12031112011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12031112011 - 2⁵ = 12031111979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12031111982 and 12031112000.

It is not an unprimeable number, because it can be changed into a prime (12031112081) 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, 25755 + ... + 157243.

It is an arithmetic number, because the mean of its divisors is an integer number (3007833750).

Almost surely, 2^12031112011 is an apocalyptic number.

12031112011 is a deficient number, since it is larger than the sum of its proper divisors (222989).

12031112011 is an equidigital number, since it uses as much as digits as its factorization.

12031112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222988.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 12031112011 its reverse (11021113021), we get a palindrome (23052225032).

The spelling of 12031112011 in words is "twelve billion, thirty-one million, one hundred twelve thousand, eleven".