12212636 has 24 divisors (see below), whose sum is σ = 22243200. Its totient is φ = 5860800.

The previous prime is 12212623. The next prime is 12212657. The reversal of 12212636 is 63621221.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 18146 + ... + 18806.

It is an arithmetic number, because the mean of its divisors is an integer number (926800).

Almost surely, 2^12212636 is an apocalyptic number.

It is an amenable number.

12212636 is a deficient number, since it is larger than the sum of its proper divisors (10030564).

12212636 is a wasteful number, since it uses less digits than its factorization.

12212636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845 (or 843 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 12212636 is about 3494.6582093246. The cubic root of 12212636 is about 230.2872026554.

Adding to 12212636 its reverse (63621221), we get a palindrome (75833857).

The spelling of 12212636 in words is "twelve million, two hundred twelve thousand, six hundred thirty-six".