12211320091 has 2 divisors, whose sum is σ = 12211320092. Its totient is φ = 12211320090.

The previous prime is 12211320089. The next prime is 12211320101. The reversal of 12211320091 is 19002311221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12211320091 - 2¹ = 12211320089 is a prime.

Together with 12211320089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12211320071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105660045 + 6105660046.

It is an arithmetic number, because the mean of its divisors is an integer number (6105660046).

Almost surely, 2^12211320091 is an apocalyptic number.

12211320091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211320091 is an equidigital number, since it uses as much as digits as its factorization.

12211320091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 12211320091 in words is "twelve billion, two hundred eleven million, three hundred twenty thousand, ninety-one".