1317220242800 has 480 divisors, whose sum is σ = 4174399488000. Its totient is φ = 386964864000.

The previous prime is 1317220242799. The next prime is 1317220242803. The reversal of 1317220242800 is 82420227131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317220242803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 116449145 + ... + 116460455.

It is an arithmetic number, because the mean of its divisors is an integer number (8696665600).

Almost surely, 2^{1317220242800} is an apocalyptic number.

1317220242800 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 1317220242800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2087199744000).

1317220242800 is an abundant number, since it is smaller than the sum of its proper divisors (2857179245200).

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

1317220242800 is a wasteful number, since it uses less digits than its factorization.

1317220242800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11565 (or 11554 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

Adding to 1317220242800 its reverse (82420227131), we get a palindrome (1399640469931).

The spelling of 1317220242800 in words is "one trillion, three hundred seventeen billion, two hundred twenty million, two hundred forty-two thousand, eight hundred".