21331221132223 has 16 divisors (see below), whose sum is σ = 22101922440000. Its totient is φ = 20562885532672.

The previous prime is 21331221132167. The next prime is 21331221132269. The reversal of 21331221132223 is 32223112213312.

It is a de Polignac number, because none of the positive numbers 2^k-21331221132223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21331221132191 and 21331221132200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331221132323) 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, 52304886 + ... + 52711132.

It is an arithmetic number, because the mean of its divisors is an integer number (1381370152500).

Almost surely, 2^{21331221132223} is an apocalyptic number.

21331221132223 is a deficient number, since it is larger than the sum of its proper divisors (770701307777).

21331221132223 is a wasteful number, since it uses less digits than its factorization.

21331221132223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409154.

The product of its digits is 5184, while the sum is 28.

Adding to 21331221132223 its reverse (32223112213312), we get a palindrome (53554333345535).

The spelling of 21331221132223 in words is "twenty-one trillion, three hundred thirty-one billion, two hundred twenty-one million, one hundred thirty-two thousand, two hundred twenty-three".