21114441043 has 4 divisors (see below), whose sum is σ = 21137619168. Its totient is φ = 21091262920.

The previous prime is 21114441013. The next prime is 21114441077. The reversal of 21114441043 is 34014441112.

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 21114441043 - 2³³ = 12524506451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21114440999 and 21114441017.

It is not an unprimeable number, because it can be changed into a prime (21114441013) 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, 11587696 + ... + 11589517.

It is an arithmetic number, because the mean of its divisors is an integer number (5284404792).

Almost surely, 2^21114441043 is an apocalyptic number.

21114441043 is a deficient number, since it is larger than the sum of its proper divisors (23178125).

21114441043 is an equidigital number, since it uses as much as digits as its factorization.

21114441043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23178124.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21114441043 its reverse (34014441112), we get a palindrome (55128882155).

The spelling of 21114441043 in words is "twenty-one billion, one hundred fourteen million, four hundred forty-one thousand, forty-three".