21331320003323 has 16 divisors (see below), whose sum is σ = 23359595947776. Its totient is φ = 19317891923040.

The previous prime is 21331320003233. The next prime is 21331320003379. The reversal of 21331320003323 is 32330002313312.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21331320003323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21331320003292 and 21331320003301.

It is not an unprimeable number, because it can be changed into a prime (21331320003023) 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, 169736036 + ... + 169861662.

It is an arithmetic number, because the mean of its divisors is an integer number (1459974746736).

Almost surely, 2^{21331320003323} is an apocalyptic number.

21331320003323 is a deficient number, since it is larger than the sum of its proper divisors (2028275944453).

21331320003323 is a wasteful number, since it uses less digits than its factorization.

21331320003323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184594.

The product of its (nonzero) digits is 5832, while the sum is 26.

Adding to 21331320003323 its reverse (32330002313312), we get a palindrome (53661322316635).

The spelling of 21331320003323 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred twenty million, three thousand, three hundred twenty-three".