21313233323323 has 4 divisors (see below), whose sum is σ = 21313300465600. Its totient is φ = 21313166181048.

The previous prime is 21313233323303. The next prime is 21313233323359. The reversal of 21313233323323 is 32332333231312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21313233323323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21313233323303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33092715 + ... + 33730612.

It is an arithmetic number, because the mean of its divisors is an integer number (5328325116400).

Almost surely, 2^{21313233323323} is an apocalyptic number.

21313233323323 is a deficient number, since it is larger than the sum of its proper divisors (67142277).

21313233323323 is an equidigital number, since it uses as much as digits as its factorization.

21313233323323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67142276.

The product of its digits is 104976, while the sum is 34.

Adding to 21313233323323 its reverse (32332333231312), we get a palindrome (53645566554635).

The spelling of 21313233323323 in words is "twenty-one trillion, three hundred thirteen billion, two hundred thirty-three million, three hundred twenty-three thousand, three hundred twenty-three".