21041013241 has 4 divisors (see below), whose sum is σ = 21227217012. Its totient is φ = 20854809472.

The previous prime is 21041013209. The next prime is 21041013247. The reversal of 21041013241 is 14231014012.

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 10533943225 + 10507070016 = 102635^2 + 102504^2 .

It is a cyclic number.

It is not a de Polignac number, because 21041013241 - 2⁵ = 21041013209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21041013247) 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, 93101716 + ... + 93101941.

It is an arithmetic number, because the mean of its divisors is an integer number (5306804253).

Almost surely, 2^21041013241 is an apocalyptic number.

It is an amenable number.

21041013241 is a deficient number, since it is larger than the sum of its proper divisors (186203771).

21041013241 is a wasteful number, since it uses less digits than its factorization.

21041013241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186203770.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21041013241 its reverse (14231014012), we get a palindrome (35272027253).

The spelling of 21041013241 in words is "twenty-one billion, forty-one million, thirteen thousand, two hundred forty-one".