11721187112 has 16 divisors (see below), whose sum is σ = 21987522900. Its totient is φ = 5857847680.

The previous prime is 11721187109. The next prime is 11721187169. The reversal of 11721187112 is 21178112711.

It is a happy number.

11721187112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7394968036 + 4326219076 = 85994^2 + 65774^2 .

It is an unprimeable number.

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, 325037 + ... + 359292.

Almost surely, 2^11721187112 is an apocalyptic number.

It is an amenable number.

11721187112 is a deficient number, since it is larger than the sum of its proper divisors (10266335788).

11721187112 is a wasteful number, since it uses less digits than its factorization.

11721187112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686476 (or 686472 counting only the distinct ones).

The product of its digits is 1568, while the sum is 32.

Adding to 11721187112 its reverse (21178112711), we get a palindrome (32899299823).

The spelling of 11721187112 in words is "eleven billion, seven hundred twenty-one million, one hundred eighty-seven thousand, one hundred twelve".