12216621788280 has 1024 divisors, whose sum is σ = 54044444160000. Its totient is φ = 2382337474560.

The previous prime is 12216621788279. The next prime is 12216621788297. The reversal of 12216621788280 is 8288712661221.

12216621788280 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 6 + 621 + 7 + 8 + 8 + 2 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 76480336 + ... + 76639904.

It is an arithmetic number, because the mean of its divisors is an integer number (52777777500).

Almost surely, 2^{12216621788280} is an apocalyptic number.

12216621788280 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 12216621788280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27022222080000).

12216621788280 is an abundant number, since it is smaller than the sum of its proper divisors (41827822371720).

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

12216621788280 is a wasteful number, since it uses less digits than its factorization.

12216621788280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159669 (or 159659 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 54.

The spelling of 12216621788280 in words is "twelve trillion, two hundred sixteen billion, six hundred twenty-one million, seven hundred eighty-eight thousand, two hundred eighty".