12218877 has 16 divisors (see below), whose sum is σ = 19748160. Its totient is φ = 7405200.

The previous prime is 12218873. The next prime is 12218891. The reversal of 12218877 is 77881221.

It is a happy number.

12218877 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12218877 - 2² = 12218873 is a prime.

It is a super-2 number, since 2×12218877² = 298601910282258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12218873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20274 + ... + 20867.

It is an arithmetic number, because the mean of its divisors is an integer number (1234260).

Almost surely, 2^12218877 is an apocalyptic number.

It is an amenable number.

12218877 is a deficient number, since it is larger than the sum of its proper divisors (7529283).

12218877 is a wasteful number, since it uses less digits than its factorization.

12218877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41161 (or 41155 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 12218877 is about 3495.5510295231. The cubic root of 12218877 is about 230.3264237179.

It can be divided in two parts, 122188 and 77, that added together give a triangular number (122265 = T₄₉₄).

The spelling of 12218877 in words is "twelve million, two hundred eighteen thousand, eight hundred seventy-seven".