12115072091 has 2 divisors, whose sum is σ = 12115072092. Its totient is φ = 12115072090.

The previous prime is 12115072069. The next prime is 12115072157. The reversal of 12115072091 is 19027051121.

It is a happy number.

12115072091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12115072091 - 2¹⁸ = 12114809947 is a prime.

It is a super-2 number, since 2×12115072091² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12115072061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6057536045 + 6057536046.

It is an arithmetic number, because the mean of its divisors is an integer number (6057536046).

Almost surely, 2^12115072091 is an apocalyptic number.

12115072091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12115072091 is an equidigital number, since it uses as much as digits as its factorization.

12115072091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 29.

The spelling of 12115072091 in words is "twelve billion, one hundred fifteen million, seventy-two thousand, ninety-one".