12218812 has 6 divisors (see below), whose sum is σ = 21382928. Its totient is φ = 6109404.

The previous prime is 12218783. The next prime is 12218821. The reversal of 12218812 is 21881221.

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, 1527348 + ... + 1527355.

Almost surely, 2^12218812 is an apocalyptic number.

It is an amenable number.

12218812 is a deficient number, since it is larger than the sum of its proper divisors (9164116).

12218812 is a wasteful number, since it uses less digits than its factorization.

12218812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054707 (or 3054705 counting only the distinct ones).

The product of its digits is 512, while the sum is 25.

The square root of 12218812 is about 3495.5417319780. The cubic root of 12218812 is about 230.3260152995.

The spelling of 12218812 in words is "twelve million, two hundred eighteen thousand, eight hundred twelve".