1331320020000 has 480 divisors, whose sum is σ = 4492263815424. Its totient is φ = 344908800000.

The previous prime is 1331320019999. The next prime is 1331320020011. The reversal of 1331320020000 is 200231331.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 666659002 + ... + 666660998.

Almost surely, 2^{1331320020000} is an apocalyptic number.

1331320020000 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 1331320020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2246131907712).

1331320020000 is an abundant number, since it is smaller than the sum of its proper divisors (3160943795424).

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

1331320020000 is a wasteful number, since it uses less digits than its factorization.

1331320020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342 (or 2319 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 1331320020000 its reverse (200231331), we get a palindrome (1331520251331).

The spelling of 1331320020000 in words is "one trillion, three hundred thirty-one billion, three hundred twenty million, twenty thousand".