2021243321 has 8 divisors (see below), whose sum is σ = 2029035840. Its totient is φ = 2013465168.

The previous prime is 2021243309. The next prime is 2021243333. The reversal of 2021243321 is 1233421202.

It is an interprime number because it is at equal distance from previous prime (2021243309) and next prime (2021243333).

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

It is a cyclic number.

It is not a de Polignac number, because 2021243321 - 2¹⁰ = 2021242297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021243293 and 2021243302.

It is not an unprimeable number, because it can be changed into a prime (2021240321) 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 7 ways as a sum of consecutive naturals, for example, 338060 + ... + 343986.

It is an arithmetic number, because the mean of its divisors is an integer number (253629480).

Almost surely, 2^2021243321 is an apocalyptic number.

It is an amenable number.

2021243321 is a deficient number, since it is larger than the sum of its proper divisors (7792519).

2021243321 is an equidigital number, since it uses as much as digits as its factorization.

2021243321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7183.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2021243321 is about 44958.2397453459. The cubic root of 2021243321 is about 1264.3661665564.

Adding to 2021243321 its reverse (1233421202), we get a palindrome (3254664523).

The spelling of 2021243321 in words is "two billion, twenty-one million, two hundred forty-three thousand, three hundred twenty-one".