2021001332321 has 4 divisors (see below), whose sum is σ = 2139883763652. Its totient is φ = 1902118900992.

The previous prime is 2021001332299. The next prime is 2021001332323. The reversal of 2021001332321 is 1232331001202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1588154448400 + 432846883921 = 1260220^2 + 657911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021001332321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2021001332293 and 2021001332302.

It is not an unprimeable number, because it can be changed into a prime (2021001332323) 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 3 ways as a sum of consecutive naturals, for example, 59441215640 + ... + 59441215673.

It is an arithmetic number, because the mean of its divisors is an integer number (534970940913).

Almost surely, 2^{2021001332321} is an apocalyptic number.

It is an amenable number.

2021001332321 is a deficient number, since it is larger than the sum of its proper divisors (118882431331).

2021001332321 is a wasteful number, since it uses less digits than its factorization.

2021001332321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118882431330.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 2021001332321 its reverse (1232331001202), we get a palindrome (3253332333523).

The spelling of 2021001332321 in words is "two trillion, twenty-one billion, one million, three hundred thirty-two thousand, three hundred twenty-one".