12021187 has 2 divisors, whose sum is σ = 12021188. Its totient is φ = 12021186.

The previous prime is 12021179. The next prime is 12021259. The reversal of 12021187 is 78112021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12021187 - 2³ = 12021179 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010593 + 6010594.

It is an arithmetic number, because the mean of its divisors is an integer number (6010594).

Almost surely, 2^12021187 is an apocalyptic number.

12021187 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021187 is an equidigital number, since it uses as much as digits as its factorization.

12021187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 12021187 is about 3467.1583465426. The cubic root of 12021187 is about 229.0775085165.

The spelling of 12021187 in words is "twelve million, twenty-one thousand, one hundred eighty-seven".