1217317920000 has 2160 divisors, whose sum is σ = 5326236558720. Its totient is φ = 239984640000.

The previous prime is 1217317919999. The next prime is 1217317920067. The reversal of 1217317920000 is 297137121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 39268319985 + ... + 39268320015.

Almost surely, 2^{1217317920000} is an apocalyptic number.

1217317920000 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 1217317920000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2663118279360).

1217317920000 is an abundant number, since it is smaller than the sum of its proper divisors (4108918638720).

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

1217317920000 is an equidigital number, since it uses as much as digits as its factorization.

1217317920000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 33.

The spelling of 1217317920000 in words is "one trillion, two hundred seventeen billion, three hundred seventeen million, nine hundred twenty thousand".