21023313223 has 16 divisors (see below), whose sum is σ = 23528419200. Its totient is φ = 18619483680.

The previous prime is 21023313191. The next prime is 21023313247. The reversal of 21023313223 is 32231332012.

It is a cyclic number.

It is not a de Polignac number, because 21023313223 - 2⁵ = 21023313191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21023313194 and 21023313203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023353223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126868 + ... + 241126.

It is an arithmetic number, because the mean of its divisors is an integer number (1470526200).

Almost surely, 2^21023313223 is an apocalyptic number.

21023313223 is a deficient number, since it is larger than the sum of its proper divisors (2505105977).

21023313223 is a wasteful number, since it uses less digits than its factorization.

21023313223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114702.

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

Adding to 21023313223 its reverse (32231332012), we get a palindrome (53254645235).

The spelling of 21023313223 in words is "twenty-one billion, twenty-three million, three hundred thirteen thousand, two hundred twenty-three".