21232222223 has 8 divisors (see below), whose sum is σ = 21752390592. Its totient is φ = 20714904736.

The previous prime is 21232222189. The next prime is 21232222241. The reversal of 21232222223 is 32222223212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21232222223 - 2¹² = 21232218127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232222283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 697640 + ... + 727437.

It is an arithmetic number, because the mean of its divisors is an integer number (2719048824).

Almost surely, 2^21232222223 is an apocalyptic number.

21232222223 is a deficient number, since it is larger than the sum of its proper divisors (520168369).

21232222223 is a wasteful number, since it uses less digits than its factorization.

21232222223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425441.

The product of its digits is 2304, while the sum is 23.

Adding to 21232222223 its reverse (32222223212), we get a palindrome (53454445435).

The spelling of 21232222223 in words is "twenty-one billion, two hundred thirty-two million, two hundred twenty-two thousand, two hundred twenty-three".