1323201440000 has 360 divisors, whose sum is σ = 3651586868160. Its totient is φ = 474342400000.

The previous prime is 1323201439873. The next prime is 1323201440003. The reversal of 1323201440000 is 441023231.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323201440003) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 124954706 + ... + 124965294.

It is an arithmetic number, because the mean of its divisors is an integer number (10143296856).

Almost surely, 2^{1323201440000} is an apocalyptic number.

1323201440000 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 1323201440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1825793434080).

1323201440000 is an abundant number, since it is smaller than the sum of its proper divisors (2328385428160).

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

1323201440000 is an equidigital number, since it uses as much as digits as its factorization.

1323201440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10707 (or 10678 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 1323201440000 its reverse (441023231), we get a palindrome (1323642463231).

The spelling of 1323201440000 in words is "one trillion, three hundred twenty-three billion, two hundred one million, four hundred forty thousand".