12243240091 has 2 divisors, whose sum is σ = 12243240092. Its totient is φ = 12243240090.

The previous prime is 12243240089. The next prime is 12243240157. The reversal of 12243240091 is 19004234221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12243240091 - 2¹ = 12243240089 is a prime.

Together with 12243240089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12243247091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6121620045 + 6121620046.

It is an arithmetic number, because the mean of its divisors is an integer number (6121620046).

Almost surely, 2^12243240091 is an apocalyptic number.

12243240091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12243240091 is an equidigital number, since it uses as much as digits as its factorization.

12243240091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 12243240091 in words is "twelve billion, two hundred forty-three million, two hundred forty thousand, ninety-one".