12091171 has 2 divisors, whose sum is σ = 12091172. Its totient is φ = 12091170.

The previous prime is 12091153. The next prime is 12091181. The reversal of 12091171 is 17119021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12091171 - 2⁵ = 12091139 is a prime.

It is not a weakly prime, because it can be changed into another prime (12091111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6045585 + 6045586.

It is an arithmetic number, because the mean of its divisors is an integer number (6045586).

Almost surely, 2^12091171 is an apocalyptic number.

12091171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12091171 is an equidigital number, since it uses as much as digits as its factorization.

12091171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 12091171 is about 3477.2361150776. The cubic root of 12091171 is about 229.5211904306.

It can be divided in two parts, 12091 and 171, that multiplied together give a triangular number (2067561 = T₂₀₃₃).

The spelling of 12091171 in words is "twelve million, ninety-one thousand, one hundred seventy-one".