12191451841 has 2 divisors, whose sum is σ = 12191451842. Its totient is φ = 12191451840.

The previous prime is 12191451827. The next prime is 12191451889. The reversal of 12191451841 is 14815419121.

12191451841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11385743616 + 805708225 = 106704^2 + 28385^2 .

It is a cyclic number.

It is not a de Polignac number, because 12191451841 - 2¹¹ = 12191449793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12191451841.

It is not a weakly prime, because it can be changed into another prime (12191451241) 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 as a sum of consecutive naturals, namely, 6095725920 + 6095725921.

It is an arithmetic number, because the mean of its divisors is an integer number (6095725921).

Almost surely, 2^12191451841 is an apocalyptic number.

It is an amenable number.

12191451841 is a deficient number, since it is larger than the sum of its proper divisors (1).

12191451841 is an equidigital number, since it uses as much as digits as its factorization.

12191451841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 37.

It can be divided in two parts, 121914 and 51841, that added together give a triangular number (173755 = T₅₈₉).

The spelling of 12191451841 in words is "twelve billion, one hundred ninety-one million, four hundred fifty-one thousand, eight hundred forty-one".