2021023321 has 2 divisors, whose sum is σ = 2021023322. Its totient is φ = 2021023320.

The previous prime is 2021023313. The next prime is 2021023337. The reversal of 2021023321 is 1233201202.

It is an a-pointer prime, because the next prime (2021023337) can be obtained adding 2021023321 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1454583321 + 566440000 = 38139^2 + 23800^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021023321 - 2³ = 2021023313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021023295 and 2021023304.

It is not a weakly prime, because it can be changed into another prime (2421023321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010511660 + 1010511661.

It is an arithmetic number, because the mean of its divisors is an integer number (1010511661).

Almost surely, 2^2021023321 is an apocalyptic number.

It is an amenable number.

2021023321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021023321 is an equidigital number, since it uses as much as digits as its factorization.

2021023321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2021023321 is about 44955.7929637550. The cubic root of 2021023321 is about 1264.3202920450.

Adding to 2021023321 its reverse (1233201202), we get a palindrome (3254224523).

The spelling of 2021023321 in words is "two billion, twenty-one million, twenty-three thousand, three hundred twenty-one".