12217882720 has 24 divisors (see below), whose sum is σ = 28864748304. Its totient is φ = 4887153024.

The previous prime is 12217882669. The next prime is 12217882723. The reversal of 12217882720 is 2728871221.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12217882723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38180724 + ... + 38181043.

It is an arithmetic number, because the mean of its divisors is an integer number (1202697846).

Almost surely, 2^12217882720 is an apocalyptic number.

12217882720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12217882720 is an abundant number, since it is smaller than the sum of its proper divisors (16646865584).

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

12217882720 is an equidigital number, since it uses as much as digits as its factorization.

12217882720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76361782 (or 76361774 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 40.

The spelling of 12217882720 in words is "twelve billion, two hundred seventeen million, eight hundred eighty-two thousand, seven hundred twenty".