1231330320000 has 960 divisors, whose sum is σ = 4878698441760. Its totient is φ = 295511040000.

The previous prime is 1231330319963. The next prime is 1231330320053. The reversal of 1231330320000 is 230331321.

1231330320000 is a `hidden beast` number, since 1 + 2 + 313 + 30 + 320 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 847439274 + ... + 847440726.

Almost surely, 2^{1231330320000} is an apocalyptic number.

1231330320000 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 1231330320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2439349220880).

1231330320000 is an abundant number, since it is smaller than the sum of its proper divisors (3647368121760).

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

1231330320000 is a wasteful number, since it uses less digits than its factorization.

1231330320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 1231330320000 its reverse (230331321), we get a palindrome (1231560651321).

The spelling of 1231330320000 in words is "one trillion, two hundred thirty-one billion, three hundred thirty million, three hundred twenty thousand".