12218497720 has 192 divisors, whose sum is σ = 34459810560. Its totient is φ = 3859722240.

The previous prime is 12218497717. The next prime is 12218497721. The reversal of 12218497720 is 2779481221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12218497721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1063929 + ... + 1075351.

It is an arithmetic number, because the mean of its divisors is an integer number (179478180).

Almost surely, 2^12218497720 is an apocalyptic number.

12218497720 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 12218497720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17229905280).

12218497720 is an abundant number, since it is smaller than the sum of its proper divisors (22241312840).

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

12218497720 is a wasteful number, since it uses less digits than its factorization.

12218497720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11486 (or 11471 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 12218497720 in words is "twelve billion, two hundred eighteen million, four hundred ninety-seven thousand, seven hundred twenty".