12127091 has 2 divisors, whose sum is σ = 12127092. Its totient is φ = 12127090.

The previous prime is 12127061. The next prime is 12127109. The reversal of 12127091 is 19072121.

Together with next prime (12127109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (19072121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12127091 - 2²² = 7932787 is a prime.

It is a super-2 number, since 2×12127091² = 294132672244562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12127061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6063545 + 6063546.

It is an arithmetic number, because the mean of its divisors is an integer number (6063546).

Almost surely, 2^12127091 is an apocalyptic number.

12127091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12127091 is an equidigital number, since it uses as much as digits as its factorization.

12127091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 12127091 is about 3482.3973064543. The cubic root of 12127091 is about 229.7482500637.

The spelling of 12127091 in words is "twelve million, one hundred twenty-seven thousand, ninety-one".