12099771091 has 2 divisors, whose sum is σ = 12099771092. Its totient is φ = 12099771090.

The previous prime is 12099771059. The next prime is 12099771109. The reversal of 12099771091 is 19017799021.

Together with next prime (12099771109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12099771091 - 2⁵ = 12099771059 is a prime.

It is not a weakly prime, because it can be changed into another prime (12099771001) 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 as a sum of consecutive naturals, namely, 6049885545 + 6049885546.

It is an arithmetic number, because the mean of its divisors is an integer number (6049885546).

Almost surely, 2^12099771091 is an apocalyptic number.

12099771091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12099771091 is an equidigital number, since it uses as much as digits as its factorization.

12099771091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71442, while the sum is 46.

The spelling of 12099771091 in words is "twelve billion, ninety-nine million, seven hundred seventy-one thousand, ninety-one".