2021321044244 has 12 divisors (see below), whose sum is σ = 3597266265600. Its totient is φ = 993530682648.

The previous prime is 2021321044217. The next prime is 2021321044247. The reversal of 2021321044244 is 4424401231202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021321044247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4282459604 + ... + 4282460075.

It is an arithmetic number, because the mean of its divisors is an integer number (299772188800).

Almost surely, 2^{2021321044244} is an apocalyptic number.

It is an amenable number.

2021321044244 is a deficient number, since it is larger than the sum of its proper divisors (1575945221356).

2021321044244 is a wasteful number, since it uses less digits than its factorization.

2021321044244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8564919742 (or 8564919740 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 2021321044244 its reverse (4424401231202), we get a palindrome (6445722275446).

The spelling of 2021321044244 in words is "two trillion, twenty-one billion, three hundred twenty-one million, forty-four thousand, two hundred forty-four".