1331322323320 has 128 divisors (see below), whose sum is σ = 3341261145600. Its totient is φ = 473327884800.

The previous prime is 1331322323311. The next prime is 1331322323323. The reversal of 1331322323320 is 233232231331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331322323323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4333771 + ... + 4630789.

It is an arithmetic number, because the mean of its divisors is an integer number (26103602700).

Almost surely, 2^{1331322323320} is an apocalyptic number.

1331322323320 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 1331322323320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1670630572800).

1331322323320 is an abundant number, since it is smaller than the sum of its proper divisors (2009938822280).

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

1331322323320 is a wasteful number, since it uses less digits than its factorization.

1331322323320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297269 (or 297265 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 28.

Adding to 1331322323320 its reverse (233232231331), we get a palindrome (1564554554651).

The spelling of 1331322323320 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-two million, three hundred twenty-three thousand, three hundred twenty".