2021021441 has 4 divisors (see below), whose sum is σ = 2021271300. Its totient is φ = 2020771584.

The previous prime is 2021021417. The next prime is 2021021467. The reversal of 2021021441 is 1441201202.

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 911798416 + 1109223025 = 30196^2 + 33305^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021021441 - 2¹⁸ = 2020759297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021021491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112376 + ... + 129113.

It is an arithmetic number, because the mean of its divisors is an integer number (505317825).

Almost surely, 2^2021021441 is an apocalyptic number.

It is an amenable number.

2021021441 is a deficient number, since it is larger than the sum of its proper divisors (249859).

2021021441 is an equidigital number, since it uses as much as digits as its factorization.

2021021441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249858.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2021021441 is about 44955.7720543202. The cubic root of 2021021441 is about 1264.3199000121.

Adding to 2021021441 its reverse (1441201202), we get a palindrome (3462222643).

The spelling of 2021021441 in words is "two billion, twenty-one million, twenty-one thousand, four hundred forty-one".