12228818725 has 12 divisors (see below), whose sum is σ = 15165244516. Its totient is φ = 9782081280.

The previous prime is 12228818689. The next prime is 12228818729. The reversal of 12228818725 is 52781882221.

It can be written as a sum of positive squares in 6 ways, for example, as 963543681 + 11265275044 = 31041^2 + 106138^2 .

It is not a de Polignac number, because 12228818725 - 2⁹ = 12228818213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12228818729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337069 + ... + 371581.

Almost surely, 2^12228818725 is an apocalyptic number.

It is an amenable number.

12228818725 is a deficient number, since it is larger than the sum of its proper divisors (2936425791).

12228818725 is a wasteful number, since it uses less digits than its factorization.

12228818725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48696 (or 48691 counting only the distinct ones).

The product of its digits is 286720, while the sum is 46.

The spelling of 12228818725 in words is "twelve billion, two hundred twenty-eight million, eight hundred eighteen thousand, seven hundred twenty-five".