12228665600 has 54 divisors (see below), whose sum is σ = 30267873930. Its totient is φ = 4891463680.

The previous prime is 12228665587. The next prime is 12228665629. The reversal of 12228665600 is 656682221.

It can be written as a sum of positive squares in 3 ways, for example, as 3098480896 + 9130184704 = 55664^2 + 95552^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 948965 + ... + 961764.

Almost surely, 2^12228665600 is an apocalyptic number.

12228665600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12228665600 is an abundant number, since it is smaller than the sum of its proper divisors (18039208330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12228665600 is an equidigital number, since it uses as much as digits as its factorization.

12228665600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910755 (or 1910736 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 12228665600 in words is "twelve billion, two hundred twenty-eight million, six hundred sixty-five thousand, six hundred".