12218902849 has 2 divisors, whose sum is σ = 12218902850. Its totient is φ = 12218902848.

The previous prime is 12218902841. The next prime is 12218902859. The reversal of 12218902849 is 94820981221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10303265025 + 1915637824 = 101505^2 + 43768^2 .

It is a cyclic number.

It is not a de Polignac number, because 12218902849 - 2³ = 12218902841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12218902799 and 12218902808.

It is not a weakly prime, because it can be changed into another prime (12218902841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6109451424 + 6109451425.

It is an arithmetic number, because the mean of its divisors is an integer number (6109451425).

Almost surely, 2^12218902849 is an apocalyptic number.

It is an amenable number.

12218902849 is a deficient number, since it is larger than the sum of its proper divisors (1).

12218902849 is an equidigital number, since it uses as much as digits as its factorization.

12218902849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 12218902849 in words is "twelve billion, two hundred eighteen million, nine hundred two thousand, eight hundred forty-nine".