21222132223 has 16 divisors (see below), whose sum is σ = 23506117056. Its totient is φ = 19057561600.

The previous prime is 21222132187. The next prime is 21222132229. The reversal of 21222132223 is 32223122212.

It is a cyclic number.

It is not a de Polignac number, because 21222132223 - 2¹³ = 21222124031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21222132194 and 21222132203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222132229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89115 + ... + 224467.

It is an arithmetic number, because the mean of its divisors is an integer number (1469132316).

Almost surely, 2^21222132223 is an apocalyptic number.

21222132223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21222132223 is a deficient number, since it is larger than the sum of its proper divisors (2283984833).

21222132223 is a wasteful number, since it uses less digits than its factorization.

21222132223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135794.

The product of its digits is 1152, while the sum is 22.

Adding to 21222132223 its reverse (32223122212), we get a palindrome (53445254435).

The spelling of 21222132223 in words is "twenty-one billion, two hundred twenty-two million, one hundred thirty-two thousand, two hundred twenty-three".