21213222113223 has 48 divisors (see below), whose sum is σ = 35212591814400. Its totient is φ = 12054799693440.

The previous prime is 21213222113203. The next prime is 21213222113227. The reversal of 21213222113223 is 32231122231212.

21213222113223 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 322 + 2 + 11 + 322 + 3 = 666.

It is not a de Polignac number, because 21213222113223 - 2¹⁶ = 21213222047687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213222113227) 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 in 47 ways as a sum of consecutive naturals, for example, 16102123 + ... + 17369651.

It is an arithmetic number, because the mean of its divisors is an integer number (733595662800).

Almost surely, 2^{21213222113223} is an apocalyptic number.

21213222113223 is a deficient number, since it is larger than the sum of its proper divisors (13999369701177).

21213222113223 is a wasteful number, since it uses less digits than its factorization.

21213222113223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269012 (or 1269009 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 21213222113223 its reverse (32231122231212), we get a palindrome (53444344344435).

The spelling of 21213222113223 in words is "twenty-one trillion, two hundred thirteen billion, two hundred twenty-two million, one hundred thirteen thousand, two hundred twenty-three".