12131132191 has 4 divisors (see below), whose sum is σ = 12136092192. Its totient is φ = 12126172192.

The previous prime is 12131132173. The next prime is 12131132203. The reversal of 12131132191 is 19123113121.

12131132191 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, and also an emirpimes, since its reverse is a distinct semiprime: 19123113121 = 7 ⋅2731873303.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12131132191 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 (12131132291) 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, 2476330 + ... + 2481223.

It is an arithmetic number, because the mean of its divisors is an integer number (3034023048).

Almost surely, 2^12131132191 is an apocalyptic number.

12131132191 is a deficient number, since it is larger than the sum of its proper divisors (4960001).

12131132191 is an equidigital number, since it uses as much as digits as its factorization.

12131132191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960000.

The product of its digits is 324, while the sum is 25.

The spelling of 12131132191 in words is "twelve billion, one hundred thirty-one million, one hundred thirty-two thousand, one hundred ninety-one".