12191691143 has 8 divisors (see below), whose sum is σ = 12515868288. Its totient is φ = 11869361784.

The previous prime is 12191691137. The next prime is 12191691181. The reversal of 12191691143 is 34119619121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12191691143 - 2⁸ = 12191690887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12191691097 and 12191691106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12191691133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 448571 + ... + 474972.

It is an arithmetic number, because the mean of its divisors is an integer number (1564483536).

Almost surely, 2^12191691143 is an apocalyptic number.

12191691143 is a deficient number, since it is larger than the sum of its proper divisors (324177145).

12191691143 is an equidigital number, since it uses as much as digits as its factorization.

12191691143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923893.

The product of its digits is 11664, while the sum is 38.

The spelling of 12191691143 in words is "twelve billion, one hundred ninety-one million, six hundred ninety-one thousand, one hundred forty-three".