12212887 has 2 divisors, whose sum is σ = 12212888. Its totient is φ = 12212886.

The previous prime is 12212881. The next prime is 12212899. The reversal of 12212887 is 78821221.

It is a weak prime.

It is an emirp because it is prime and its reverse (78821221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106443 + 6106444.

It is an arithmetic number, because the mean of its divisors is an integer number (6106444).

Almost surely, 2^12212887 is an apocalyptic number.

12212887 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212887 is an equidigital number, since it uses as much as digits as its factorization.

12212887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3584, while the sum is 31.

The square root of 12212887 is about 3494.6941210927. The cubic root of 12212887 is about 230.2887803025.

The spelling of 12212887 in words is "twelve million, two hundred twelve thousand, eight hundred eighty-seven".