12226665216 has 72 divisors (see below), whose sum is σ = 32561287920. Its totient is φ = 4072984576.

The previous prime is 12226665173. The next prime is 12226665257. The reversal of 12226665216 is 61256662221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1511230 + ... + 1519298.

It is an arithmetic number, because the mean of its divisors is an integer number (452240110).

Almost surely, 2^12226665216 is an apocalyptic number.

12226665216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12226665216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16280643960).

12226665216 is an abundant number, since it is smaller than the sum of its proper divisors (20334622704).

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

12226665216 is an equidigital number, since it uses as much as digits as its factorization.

12226665216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10061 (or 10047 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The spelling of 12226665216 in words is "twelve billion, two hundred twenty-six million, six hundred sixty-five thousand, two hundred sixteen".