1321312300000 has 576 divisors, whose sum is σ = 4096312819200. Its totient is φ = 407520000000.

The previous prime is 1321312299977. The next prime is 1321312300013. The reversal of 1321312300000 is 32131231.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 777699151 + ... + 777700849.

It is an arithmetic number, because the mean of its divisors is an integer number (7111654200).

Almost surely, 2^{1321312300000} is an apocalyptic number.

1321312300000 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 1321312300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2048156409600).

1321312300000 is an abundant number, since it is smaller than the sum of its proper divisors (2775000519200).

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

1321312300000 is a wasteful number, since it uses less digits than its factorization.

1321312300000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853 (or 1825 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 1321312300000 its reverse (32131231), we get a palindrome (1321344431231).

The spelling of 1321312300000 in words is "one trillion, three hundred twenty-one billion, three hundred twelve million, three hundred thousand".