12210287 has 2 divisors, whose sum is σ = 12210288. Its totient is φ = 12210286.

The previous prime is 12210283. The next prime is 12210307. The reversal of 12210287 is 78201221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12210287 - 2² = 12210283 is a prime.

It is a super-2 number, since 2×12210287² = 298182217244738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12210283) 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, 6105143 + 6105144.

It is an arithmetic number, because the mean of its divisors is an integer number (6105144).

Almost surely, 2^12210287 is an apocalyptic number.

12210287 is a deficient number, since it is larger than the sum of its proper divisors (1).

12210287 is an equidigital number, since it uses as much as digits as its factorization.

12210287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 12210287 is about 3494.3221087931. The cubic root of 12210287 is about 230.2724370928.

The spelling of 12210287 in words is "twelve million, two hundred ten thousand, two hundred eighty-seven".