12212686 has 4 divisors (see below), whose sum is σ = 18319032. Its totient is φ = 6106342.

The previous prime is 12212677. The next prime is 12212699. The reversal of 12212686 is 68621221.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3053170 + ... + 3053173.

It is an arithmetic number, because the mean of its divisors is an integer number (4579758).

Almost surely, 2^12212686 is an apocalyptic number.

12212686 is a deficient number, since it is larger than the sum of its proper divisors (6106346).

12212686 is an equidigital number, since it uses as much as digits as its factorization.

12212686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6106345.

The product of its digits is 2304, while the sum is 28.

The square root of 12212686 is about 3494.6653630927. The cubic root of 12212686 is about 230.2875169294.

The spelling of 12212686 in words is "twelve million, two hundred twelve thousand, six hundred eighty-six".