21332112231 has 8 divisors (see below), whose sum is σ = 29939806720. Its totient is φ = 13472912952.

The previous prime is 21332112209. The next prime is 21332112257. The reversal of 21332112231 is 13221123312.

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

It is not a de Polignac number, because 21332112231 - 2⁷ = 21332112103 is a prime.

It is a super-2 number, since 2×21332112231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21332112198 and 21332112207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332112331) 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 7 ways as a sum of consecutive naturals, for example, 187123735 + ... + 187123848.

It is an arithmetic number, because the mean of its divisors is an integer number (3742475840).

Almost surely, 2^21332112231 is an apocalyptic number.

21332112231 is a deficient number, since it is larger than the sum of its proper divisors (8607694489).

21332112231 is a wasteful number, since it uses less digits than its factorization.

21332112231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374247605.

The product of its digits is 432, while the sum is 21.

Adding to 21332112231 its reverse (13221123312), we get a palindrome (34553235543).

The spelling of 21332112231 in words is "twenty-one billion, three hundred thirty-two million, one hundred twelve thousand, two hundred thirty-one".