21234322223 has 16 divisors (see below), whose sum is σ = 22601356992. Its totient is φ = 19906656000.

The previous prime is 21234322201. The next prime is 21234322273. The reversal of 21234322223 is 32222343212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21234322223 - 2¹⁴ = 21234305839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21234322192 and 21234322201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234322273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367313 + ... + 421173.

It is an arithmetic number, because the mean of its divisors is an integer number (1412584812).

Almost surely, 2^21234322223 is an apocalyptic number.

21234322223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21234322223 is a deficient number, since it is larger than the sum of its proper divisors (1367034769).

21234322223 is a wasteful number, since it uses less digits than its factorization.

21234322223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54226.

The product of its digits is 6912, while the sum is 26.

Adding to 21234322223 its reverse (32222343212), we get a palindrome (53456665435).

The spelling of 21234322223 in words is "twenty-one billion, two hundred thirty-four million, three hundred twenty-two thousand, two hundred twenty-three".