2021243404441 has 16 divisors (see below), whose sum is σ = 2101324680000. Its totient is φ = 1941878335936.

The previous prime is 2021243404429. The next prime is 2021243404457. The reversal of 2021243404441 is 1444043421202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2021243404441 - 2¹⁵ = 2021243371673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021243404241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4512930 + ... + 4940548.

It is an arithmetic number, because the mean of its divisors is an integer number (131332792500).

Almost surely, 2^{2021243404441} is an apocalyptic number.

It is an amenable number.

2021243404441 is a deficient number, since it is larger than the sum of its proper divisors (80081275559).

2021243404441 is a wasteful number, since it uses less digits than its factorization.

2021243404441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428456.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 2021243404441 its reverse (1444043421202), we get a palindrome (3465286825643).

The spelling of 2021243404441 in words is "two trillion, twenty-one billion, two hundred forty-three million, four hundred four thousand, four hundred forty-one".