12072191191 has 4 divisors (see below), whose sum is σ = 12078503712. Its totient is φ = 12065878672.

The previous prime is 12072191189. The next prime is 12072191207. The reversal of 12072191191 is 19119127021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19119127021 = 401 ⋅47678621.

It is a cyclic number.

It is not a de Polignac number, because 12072191191 - 2¹ = 12072191189 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 (12072191591) 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 3 ways as a sum of consecutive naturals, for example, 3153391 + ... + 3157216.

It is an arithmetic number, because the mean of its divisors is an integer number (3019625928).

Almost surely, 2^12072191191 is an apocalyptic number.

12072191191 is a deficient number, since it is larger than the sum of its proper divisors (6312521).

12072191191 is an equidigital number, since it uses as much as digits as its factorization.

12072191191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6312520.

The product of its (nonzero) digits is 2268, while the sum is 34.

The spelling of 12072191191 in words is "twelve billion, seventy-two million, one hundred ninety-one thousand, one hundred ninety-one".