12191375308226 has 8 divisors (see below), whose sum is σ = 18287372602044. Its totient is φ = 6095584440880.

The previous prime is 12191375308219. The next prime is 12191375308291. The reversal of 12191375308226 is 62280357319121.

It is a Cunningham number, because it is equal to 3491615²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 12191375308225 + 1 = 3491615^2 + 1^2 .

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

It is an unprimeable number.

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, 51458885 + ... + 51695256.

Almost surely, 2^{12191375308226} is an apocalyptic number.

12191375308226 is a deficient number, since it is larger than the sum of its proper divisors (6095997293818).

12191375308226 is a wasteful number, since it uses less digits than its factorization.

12191375308226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103213236.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 12191375308226 in words is "twelve trillion, one hundred ninety-one billion, three hundred seventy-five million, three hundred eight thousand, two hundred twenty-six".