1323320320021 has 16 divisors (see below), whose sum is σ = 1515907540224. Its totient is φ = 1131620062464.

The previous prime is 1323320319989. The next prime is 1323320320031. The reversal of 1323320320021 is 1200230233231.

It is a cyclic number.

It is not a de Polignac number, because 1323320320021 - 2⁵ = 1323320319989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1323320319974 and 1323320320001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323320320031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10135471 + ... + 10265203.

It is an arithmetic number, because the mean of its divisors is an integer number (94744221264).

Almost surely, 2^{1323320320021} is an apocalyptic number.

It is an amenable number.

1323320320021 is a deficient number, since it is larger than the sum of its proper divisors (192587220203).

1323320320021 is a wasteful number, since it uses less digits than its factorization.

1323320320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133140.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 1323320320021 its reverse (1200230233231), we get a palindrome (2523550553252).

The spelling of 1323320320021 in words is "one trillion, three hundred twenty-three billion, three hundred twenty million, three hundred twenty thousand, twenty-one".