21203233113223 has 32 divisors (see below), whose sum is σ = 25101776768000. Its totient is φ = 17898721660512.

The previous prime is 21203233113173. The next prime is 21203233113247. The reversal of 21203233113223 is 32231133230212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-21203233113223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21203233113191 and 21203233113200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203233117223) 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 in 31 ways as a sum of consecutive naturals, for example, 99332173 + ... + 99545401.

It is an arithmetic number, because the mean of its divisors is an integer number (784430524000).

Almost surely, 2^{21203233113223} is an apocalyptic number.

21203233113223 is a deficient number, since it is larger than the sum of its proper divisors (3898543654777).

21203233113223 is an equidigital number, since it uses as much as digits as its factorization.

21203233113223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217644 (or 217630 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21203233113223 its reverse (32231133230212), we get a palindrome (53434366343435).

The spelling of 21203233113223 in words is "twenty-one trillion, two hundred three billion, two hundred thirty-three million, one hundred thirteen thousand, two hundred twenty-three".