1321324000000 has 126 divisors (see below), whose sum is σ = 3296826003212. Its totient is φ = 528528000000.

The previous prime is 1321323999997. The next prime is 1321324000033. The reversal of 1321324000000 is 4231231.

It is a happy number.

It is a super-2 number, since 2×1321324000000² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 3834835 + ... + 4165165.

Almost surely, 2^{1321324000000} is an apocalyptic number.

1321324000000 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 1321324000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1648413001606).

1321324000000 is an abundant number, since it is smaller than the sum of its proper divisors (1975502003212).

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

1321324000000 is an frugal number, since it uses more digits than its factorization.

1321324000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330377 (or 330338 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 1321324000000 its reverse (4231231), we get a palindrome (1321328231231).

The spelling of 1321324000000 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-four million", and thus it is an aban number.