21232224143 has 4 divisors (see below), whose sum is σ = 22865472168. Its totient is φ = 19598976120.

The previous prime is 21232224049. The next prime is 21232224179. The reversal of 21232224143 is 34142223212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21232224143 - 2¹² = 21232220047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232224193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816623993 + ... + 816624018.

It is an arithmetic number, because the mean of its divisors is an integer number (5716368042).

Almost surely, 2^21232224143 is an apocalyptic number.

21232224143 is a deficient number, since it is larger than the sum of its proper divisors (1633248025).

21232224143 is a wasteful number, since it uses less digits than its factorization.

21232224143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633248024.

The product of its digits is 4608, while the sum is 26.

Adding to 21232224143 its reverse (34142223212), we get a palindrome (55374447355).

The spelling of 21232224143 in words is "twenty-one billion, two hundred thirty-two million, two hundred twenty-four thousand, one hundred forty-three".