21044420241 has 32 divisors (see below), whose sum is σ = 32117057280. Its totient is φ = 12142178304.

The previous prime is 21044420183. The next prime is 21044420303. The reversal of 21044420241 is 14202444012.

It is not a de Polignac number, because 21044420241 - 2¹⁰ = 21044419217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21044420041) 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 31 ways as a sum of consecutive naturals, for example, 114025 + ... + 234713.

It is an arithmetic number, because the mean of its divisors is an integer number (1003658040).

Almost surely, 2^21044420241 is an apocalyptic number.

It is an amenable number.

21044420241 is a deficient number, since it is larger than the sum of its proper divisors (11072637039).

21044420241 is a wasteful number, since it uses less digits than its factorization.

21044420241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120985.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 21044420241 its reverse (14202444012), we get a palindrome (35246864253).

The spelling of 21044420241 in words is "twenty-one billion, forty-four million, four hundred twenty thousand, two hundred forty-one".