21041124441 has 4 divisors (see below), whose sum is σ = 28054832592. Its totient is φ = 14027416292.

The previous prime is 21041124397. The next prime is 21041124463. The reversal of 21041124441 is 14442114012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21041124441 - 2¹¹ = 21041122393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21041124241) 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, 3506854071 + ... + 3506854076.

It is an arithmetic number, because the mean of its divisors is an integer number (7013708148).

Almost surely, 2^21041124441 is an apocalyptic number.

It is an amenable number.

21041124441 is a deficient number, since it is larger than the sum of its proper divisors (7013708151).

21041124441 is an equidigital number, since it uses as much as digits as its factorization.

21041124441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7013708150.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 21041124441 its reverse (14442114012), we get a palindrome (35483238453).

The spelling of 21041124441 in words is "twenty-one billion, forty-one million, one hundred twenty-four thousand, four hundred forty-one".