12111131203111 has 4 divisors (see below), whose sum is σ = 12111139058152. Its totient is φ = 12111123348072.

The previous prime is 12111131203021. The next prime is 12111131203151. The reversal of 12111131203111 is 11130213111121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12111131203111 - 2⁷ = 12111131202983 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 (12111131203151) 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, 767016 + ... + 4981021.

It is an arithmetic number, because the mean of its divisors is an integer number (3027784764538).

Almost surely, 2^{12111131203111} is an apocalyptic number.

12111131203111 is a deficient number, since it is larger than the sum of its proper divisors (7855041).

12111131203111 is an equidigital number, since it uses as much as digits as its factorization.

12111131203111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7855040.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 12111131203111 its reverse (11130213111121), we get a palindrome (23241344314232).

The spelling of 12111131203111 in words is "twelve trillion, one hundred eleven billion, one hundred thirty-one million, two hundred three thousand, one hundred eleven".