21331114443 has 12 divisors (see below), whose sum is σ = 30819583080. Its totient is φ = 14217062976.

The previous prime is 21331114397. The next prime is 21331114451. The reversal of 21331114443 is 34441113312.

21331114443 is a `hidden beast` number, since 213 + 3 + 1 + 1 + 1 + 4 + 443 = 666.

It is not a de Polignac number, because 21331114443 - 2⁸ = 21331114187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21331114243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 269721 + ... + 339722.

It is an arithmetic number, because the mean of its divisors is an integer number (2568298590).

Almost surely, 2^21331114443 is an apocalyptic number.

21331114443 is a deficient number, since it is larger than the sum of its proper divisors (9488468637).

21331114443 is a wasteful number, since it uses less digits than its factorization.

21331114443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613338 (or 613335 counting only the distinct ones).

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

Adding to 21331114443 its reverse (34441113312), we get a palindrome (55772227755).

The spelling of 21331114443 in words is "twenty-one billion, three hundred thirty-one million, one hundred fourteen thousand, four hundred forty-three".