21232223032123 has 2 divisors, whose sum is σ = 21232223032124. Its totient is φ = 21232223032122.

The previous prime is 21232223032073. The next prime is 21232223032211. The reversal of 21232223032123 is 32123032223212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21232223032123 - 2¹³ = 21232223023931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21232223032091 and 21232223032100.

It is not a weakly prime, because it can be changed into another prime (21232223032523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616111516061 + 10616111516062.

It is an arithmetic number, because the mean of its divisors is an integer number (10616111516062).

Almost surely, 2^{21232223032123} is an apocalyptic number.

21232223032123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232223032123 is an equidigital number, since it uses as much as digits as its factorization.

21232223032123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 21232223032123 its reverse (32123032223212), we get a palindrome (53355255255335).

The spelling of 21232223032123 in words is "twenty-one trillion, two hundred thirty-two billion, two hundred twenty-three million, thirty-two thousand, one hundred twenty-three".