21003244114441 has 4 divisors (see below), whose sum is σ = 21003254305300. Its totient is φ = 21003233923584.

The previous prime is 21003244114417. The next prime is 21003244114553. The reversal of 21003244114441 is 14441144230012.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 781845008400 + 20221399106041 = 884220^2 + 4496821^2 .

It is a cyclic number.

It is not a de Polignac number, because 21003244114441 - 2⁷ = 21003244114313 is a prime.

It is a super-2 number, since 2×21003244114441² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21003244214441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 792996 + ... + 6529573.

It is an arithmetic number, because the mean of its divisors is an integer number (5250813576325).

Almost surely, 2^{21003244114441} is an apocalyptic number.

It is an amenable number.

21003244114441 is a deficient number, since it is larger than the sum of its proper divisors (10190859).

21003244114441 is an equidigital number, since it uses as much as digits as its factorization.

21003244114441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10190858.

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 21003244114441 its reverse (14441144230012), we get a palindrome (35444388344453).

The spelling of 21003244114441 in words is "twenty-one trillion, three billion, two hundred forty-four million, one hundred fourteen thousand, four hundred forty-one".