12218935 has 4 divisors (see below), whose sum is σ = 14662728. Its totient is φ = 9775144.

The previous prime is 12218933. The next prime is 12218939. The reversal of 12218935 is 53981221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53981221 = 7 ⋅7711603.

It is a cyclic number.

It is not a de Polignac number, because 12218935 - 2¹ = 12218933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12218897 and 12218906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12218933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1221889 + ... + 1221898.

It is an arithmetic number, because the mean of its divisors is an integer number (3665682).

Almost surely, 2^12218935 is an apocalyptic number.

12218935 is a deficient number, since it is larger than the sum of its proper divisors (2443793).

12218935 is an equidigital number, since it uses as much as digits as its factorization.

12218935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443792.

The product of its digits is 4320, while the sum is 31.

The square root of 12218935 is about 3495.5593257732. The cubic root of 12218935 is about 230.3267881516.

The spelling of 12218935 in words is "twelve million, two hundred eighteen thousand, nine hundred thirty-five".