21322111223 has 24 divisors (see below), whose sum is σ = 24904013184. Its totient is φ = 18202060800.

The previous prime is 21322111219. The next prime is 21322111247. The reversal of 21322111223 is 32211122312.

It is not a de Polignac number, because 21322111223 - 2² = 21322111219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21322111195 and 21322111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322111123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21515258 + ... + 21516248.

It is an arithmetic number, because the mean of its divisors is an integer number (1037667216).

Almost surely, 2^21322111223 is an apocalyptic number.

21322111223 is a deficient number, since it is larger than the sum of its proper divisors (3581901961).

21322111223 is an equidigital number, since it uses as much as digits as its factorization.

21322111223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343 (or 2336 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 21322111223 its reverse (32211122312), we get a palindrome (53533233535).

The spelling of 21322111223 in words is "twenty-one billion, three hundred twenty-two million, one hundred eleven thousand, two hundred twenty-three".