12218408236 has 12 divisors (see below), whose sum is σ = 21455193312. Its totient is φ = 6088353008.

The previous prime is 12218408227. The next prime is 12218408281. The reversal of 12218408236 is 63280481221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12218408195 and 12218408204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5211460 + ... + 5213803.

It is an arithmetic number, because the mean of its divisors is an integer number (1787932776).

Almost surely, 2^12218408236 is an apocalyptic number.

It is an amenable number.

12218408236 is a deficient number, since it is larger than the sum of its proper divisors (9236785076).

12218408236 is a wasteful number, since it uses less digits than its factorization.

12218408236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10425560 (or 10425558 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

Adding to 12218408236 its reverse (63280481221), we get a palindrome (75498889457).

The spelling of 12218408236 in words is "twelve billion, two hundred eighteen million, four hundred eight thousand, two hundred thirty-six".