21441100521041 has 4 divisors (see below), whose sum is σ = 22180448814900. Its totient is φ = 20701752227184.

The previous prime is 21441100521037. The next prime is 21441100521047. The reversal of 21441100521041 is 14012500114412.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6762210180625 + 14678890340416 = 2600425^2 + 3831304^2 .

It is a cyclic number.

It is not a de Polignac number, because 21441100521041 - 2² = 21441100521037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21441100521041.

It is not an unprimeable number, because it can be changed into a prime (21441100521047) 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, 369674146886 + ... + 369674146943.

It is an arithmetic number, because the mean of its divisors is an integer number (5545112203725).

Almost surely, 2^{21441100521041} is an apocalyptic number.

It is an amenable number.

21441100521041 is a deficient number, since it is larger than the sum of its proper divisors (739348293859).

21441100521041 is an equidigital number, since it uses as much as digits as its factorization.

21441100521041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739348293858.

The product of its (nonzero) digits is 1280, while the sum is 26.

Adding to 21441100521041 its reverse (14012500114412), we get a palindrome (35453600635453).

The spelling of 21441100521041 in words is "twenty-one trillion, four hundred forty-one billion, one hundred million, five hundred twenty-one thousand, forty-one".