12211011221191 has 2 divisors, whose sum is σ = 12211011221192. Its totient is φ = 12211011221190.

The previous prime is 12211011221179. The next prime is 12211011221239. The reversal of 12211011221191 is 19112211011221.

It is a weak prime.

It is an emirp because it is prime and its reverse (19112211011221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12211011221191 - 2¹³ = 12211011212999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211011221111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105505610595 + 6105505610596.

It is an arithmetic number, because the mean of its divisors is an integer number (6105505610596).

Almost surely, 2^{12211011221191} is an apocalyptic number.

12211011221191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211011221191 is an equidigital number, since it uses as much as digits as its factorization.

12211011221191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 25.

The spelling of 12211011221191 in words is "twelve trillion, two hundred eleven billion, eleven million, two hundred twenty-one thousand, one hundred ninety-one".