1331321430320 has 80 divisors (see below), whose sum is σ = 3539603242560. Its totient is φ = 456183124992.

The previous prime is 1331321430301. The next prime is 1331321430343. The reversal of 1331321430320 is 230341231331.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 1331321430320.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245966 + ... + 1650194.

It is an arithmetic number, because the mean of its divisors is an integer number (44245040532).

Almost surely, 2^{1331321430320} is an apocalyptic number.

1331321430320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331321430320 is an abundant number, since it is smaller than the sum of its proper divisors (2208281812240).

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

1331321430320 is a wasteful number, since it uses less digits than its factorization.

1331321430320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405942 (or 1405936 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 1331321430320 its reverse (230341231331), we get a palindrome (1561662661651).

The spelling of 1331321430320 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-one million, four hundred thirty thousand, three hundred twenty".