1321313223320 has 16 divisors (see below), whose sum is σ = 2972954752560. Its totient is φ = 528525289312.

The previous prime is 1321313223311. The next prime is 1321313223323. The reversal of 1321313223320 is 233223131231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321313223320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321313223323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16516415252 + ... + 16516415331.

It is an arithmetic number, because the mean of its divisors is an integer number (185809672035).

Almost surely, 2^{1321313223320} is an apocalyptic number.

1321313223320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321313223320 is an abundant number, since it is smaller than the sum of its proper divisors (1651641529240).

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

1321313223320 is a wasteful number, since it uses less digits than its factorization.

1321313223320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33032830594 (or 33032830590 counting only the distinct ones).

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

Adding to 1321313223320 its reverse (233223131231), we get a palindrome (1554536354551).

The spelling of 1321313223320 in words is "one trillion, three hundred twenty-one billion, three hundred thirteen million, two hundred twenty-three thousand, three hundred twenty".