12210887 has 4 divisors (see below), whose sum is σ = 13150200. Its totient is φ = 11271576.

The previous prime is 12210883. The next prime is 12210937. The reversal of 12210887 is 78801221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78801221 = 41 ⋅1921981.

It is a cyclic number.

It is not a de Polignac number, because 12210887 - 2² = 12210883 is a prime.

It is a super-2 number, since 2×12210887² = 298211522653538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210881) 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 in 3 ways as a sum of consecutive naturals, for example, 469637 + ... + 469662.

It is an arithmetic number, because the mean of its divisors is an integer number (3287550).

Almost surely, 2^12210887 is an apocalyptic number.

12210887 is a deficient number, since it is larger than the sum of its proper divisors (939313).

12210887 is an equidigital number, since it uses as much as digits as its factorization.

12210887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939312.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 12210887 is about 3494.4079613005. The cubic root of 12210887 is about 230.2762088086.

The spelling of 12210887 in words is "twelve million, two hundred ten thousand, eight hundred eighty-seven".