12216262660 has 96 divisors (see below), whose sum is σ = 29638425600. Its totient is φ = 4143052800.

The previous prime is 12216262637. The next prime is 12216262691. The reversal of 12216262660 is 6626261221.

It is a super-2 number, since 2×12216262660² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5651980 + ... + 5654140.

It is an arithmetic number, because the mean of its divisors is an integer number (308733600).

Almost surely, 2^12216262660 is an apocalyptic number.

12216262660 is a gapful number since it is divisible by the number (10) 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 12216262660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14819212800).

12216262660 is an abundant number, since it is smaller than the sum of its proper divisors (17422162940).

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

12216262660 is a wasteful number, since it uses less digits than its factorization.

12216262660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597 (or 2595 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 12216262660 in words is "twelve billion, two hundred sixteen million, two hundred sixty-two thousand, six hundred sixty".