12201099991 has 2 divisors, whose sum is σ = 12201099992. Its totient is φ = 12201099990.

The previous prime is 12201099959. The next prime is 12201100049. The reversal of 12201099991 is 19999010221.

It is a weak prime.

It is an emirp because it is prime and its reverse (19999010221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12201099991 - 2⁵ = 12201099959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12201099901) 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, 6100549995 + 6100549996.

It is an arithmetic number, because the mean of its divisors is an integer number (6100549996).

Almost surely, 2^12201099991 is an apocalyptic number.

12201099991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12201099991 is an equidigital number, since it uses as much as digits as its factorization.

12201099991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 43.

The spelling of 12201099991 in words is "twelve billion, two hundred one million, ninety-nine thousand, nine hundred ninety-one".