12111332111111 has 4 divisors (see below), whose sum is σ = 12309878539224. Its totient is φ = 11912785683000.

The previous prime is 12111332111071. The next prime is 12111332111141. The reversal of 12111332111111 is 11111123311121.

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 12111332111111 - 2²⁶ = 12111265002247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111332111141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99273213965 + ... + 99273214086.

It is an arithmetic number, because the mean of its divisors is an integer number (3077469634806).

Almost surely, 2^{12111332111111} is an apocalyptic number.

12111332111111 is a deficient number, since it is larger than the sum of its proper divisors (198546428113).

12111332111111 is an equidigital number, since it uses as much as digits as its factorization.

12111332111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198546428112.

The product of its digits is 36, while the sum is 20.

Adding to 12111332111111 its reverse (11111123311121), we get a palindrome (23222455422232).

The spelling of 12111332111111 in words is "twelve trillion, one hundred eleven billion, three hundred thirty-two million, one hundred eleven thousand, one hundred eleven".