21223321323 has 32 divisors (see below), whose sum is σ = 30710323200. Its totient is φ = 13001129856.

The previous prime is 21223321321. The next prime is 21223321331. The reversal of 21223321323 is 32312332212.

It is not a de Polignac number, because 21223321323 - 2¹ = 21223321321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21223321293 and 21223321302.

It is not an unprimeable number, because it can be changed into a prime (21223321321) 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 31 ways as a sum of consecutive naturals, for example, 149073 + ... + 254301.

It is an arithmetic number, because the mean of its divisors is an integer number (959697600).

Almost surely, 2^21223321323 is an apocalyptic number.

21223321323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21223321323 is a deficient number, since it is larger than the sum of its proper divisors (9487001877).

21223321323 is a wasteful number, since it uses less digits than its factorization.

21223321323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105371.

The product of its digits is 2592, while the sum is 24.

Adding to 21223321323 its reverse (32312332212), we get a palindrome (53535653535).

The spelling of 21223321323 in words is "twenty-one billion, two hundred twenty-three million, three hundred twenty-one thousand, three hundred twenty-three".