21010440441 has 8 divisors (see below), whose sum is σ = 28014700384. Its totient is φ = 14006570400.

The previous prime is 21010440427. The next prime is 21010440457. The reversal of 21010440441 is 14404401012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21010440441 - 2⁹ = 21010439929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010440401) 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 7 ways as a sum of consecutive naturals, for example, 68766 + ... + 216216.

It is an arithmetic number, because the mean of its divisors is an integer number (3501837548).

Almost surely, 2^21010440441 is an apocalyptic number.

It is an amenable number.

21010440441 is a deficient number, since it is larger than the sum of its proper divisors (7004259943).

21010440441 is a wasteful number, since it uses less digits than its factorization.

21010440441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194951.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21010440441 its reverse (14404401012), we get a palindrome (35414841453).

The spelling of 21010440441 in words is "twenty-one billion, ten million, four hundred forty thousand, four hundred forty-one".