1243303040000 has 440 divisors, whose sum is σ = 3570462686208. Its totient is φ = 423751680000.

The previous prime is 1243303039991. The next prime is 1243303040039. The reversal of 1243303040000 is 403033421.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 855679274 + ... + 855680726.

Almost surely, 2^{1243303040000} is an apocalyptic number.

1243303040000 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 1243303040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785231343104).

1243303040000 is an abundant number, since it is smaller than the sum of its proper divisors (2327159646208).

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

1243303040000 is an equidigital number, since it uses as much as digits as its factorization.

1243303040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691 (or 1658 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 1243303040000 its reverse (403033421), we get a palindrome (1243706073421).

The spelling of 1243303040000 in words is "one trillion, two hundred forty-three billion, three hundred three million, forty thousand".