21133224111 has 8 divisors (see below), whose sum is σ = 28357108144. Its totient is φ = 13999078080.

The previous prime is 21133224109. The next prime is 21133224137. The reversal of 21133224111 is 11142233112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21133224111 - 2¹ = 21133224109 is a prime.

It is a super-2 number, since 2×21133224111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133224181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22433950 + ... + 22434891.

It is an arithmetic number, because the mean of its divisors is an integer number (3544638518).

Almost surely, 2^21133224111 is an apocalyptic number.

21133224111 is a deficient number, since it is larger than the sum of its proper divisors (7223884033).

21133224111 is a wasteful number, since it uses less digits than its factorization.

21133224111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44869001.

The product of its digits is 288, while the sum is 21.

Adding to 21133224111 its reverse (11142233112), we get a palindrome (32275457223).

Subtracting from 21133224111 its reverse (11142233112), we obtain a palindrome (9990990999).

The spelling of 21133224111 in words is "twenty-one billion, one hundred thirty-three million, two hundred twenty-four thousand, one hundred eleven".