2043320044021 has 16 divisors (see below), whose sum is σ = 2099776553280. Its totient is φ = 1987598937600.

The previous prime is 2043320043997. The next prime is 2043320044037. The reversal of 2043320044021 is 1204400233402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2043320044021 - 2³⁹ = 1493564230133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043320044061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32595510 + ... + 32658136.

It is an arithmetic number, because the mean of its divisors is an integer number (131236034580).

Almost surely, 2^{2043320044021} is an apocalyptic number.

It is an amenable number.

2043320044021 is a deficient number, since it is larger than the sum of its proper divisors (56456509259).

2043320044021 is an equidigital number, since it uses as much as digits as its factorization.

2043320044021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68484.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 2043320044021 its reverse (1204400233402), we get a palindrome (3247720277423).

The spelling of 2043320044021 in words is "two trillion, forty-three billion, three hundred twenty million, forty-four thousand, twenty-one".