21330123223 has 8 divisors (see below), whose sum is σ = 21800917440. Its totient is φ = 20860035840.

The previous prime is 21330123179. The next prime is 21330123257. The reversal of 21330123223 is 32232103312.

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 21330123223 - 2¹³ = 21330115031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21330123194 and 21330123203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330123293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115458 + ... + 236623.

It is an arithmetic number, because the mean of its divisors is an integer number (2725114680).

Almost surely, 2^21330123223 is an apocalyptic number.

21330123223 is a deficient number, since it is larger than the sum of its proper divisors (470794217).

21330123223 is a wasteful number, since it uses less digits than its factorization.

21330123223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353417.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21330123223 its reverse (32232103312), we get a palindrome (53562226535).

The spelling of 21330123223 in words is "twenty-one billion, three hundred thirty million, one hundred twenty-three thousand, two hundred twenty-three".