21232123223 has 2 divisors, whose sum is σ = 21232123224. Its totient is φ = 21232123222.

The previous prime is 21232123217. The next prime is 21232123229. The reversal of 21232123223 is 32232123212.

It is a balanced prime because it is at equal distance from previous prime (21232123217) and next prime (21232123229).

It is a cyclic number.

It is not a de Polignac number, because 21232123223 - 2⁴ = 21232123207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21232123229) 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 as a sum of consecutive naturals, namely, 10616061611 + 10616061612.

It is an arithmetic number, because the mean of its divisors is an integer number (10616061612).

Almost surely, 2^21232123223 is an apocalyptic number.

21232123223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232123223 is an equidigital number, since it uses as much as digits as its factorization.

21232123223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 23.

Adding to 21232123223 its reverse (32232123212), we get a palindrome (53464246435).

The spelling of 21232123223 in words is "twenty-one billion, two hundred thirty-two million, one hundred twenty-three thousand, two hundred twenty-three".