12311001191 has 2 divisors, whose sum is σ = 12311001192. Its totient is φ = 12311001190.

The previous prime is 12311001187. The next prime is 12311001221. The reversal of 12311001191 is 19110011321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12311001191 - 2² = 12311001187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12311051191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155500595 + 6155500596.

It is an arithmetic number, because the mean of its divisors is an integer number (6155500596).

Almost surely, 2^12311001191 is an apocalyptic number.

12311001191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311001191 is an equidigital number, since it uses as much as digits as its factorization.

12311001191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 20.

The spelling of 12311001191 in words is "twelve billion, three hundred eleven million, one thousand, one hundred ninety-one".