2021338243 has 2 divisors, whose sum is σ = 2021338244. Its totient is φ = 2021338242.

The previous prime is 2021338219. The next prime is 2021338247. The reversal of 2021338243 is 3428331202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021338243 - 2⁵ = 2021338211 is a prime.

It is a super-2 number, since 2×2021338243² = 8171616585228654098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2021338247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010669121 + 1010669122.

It is an arithmetic number, because the mean of its divisors is an integer number (1010669122).

Almost surely, 2^2021338243 is an apocalyptic number.

2021338243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021338243 is an equidigital number, since it uses as much as digits as its factorization.

2021338243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 2021338243 is about 44959.2954015074. The cubic root of 2021338243 is about 1264.3859587119.

Adding to 2021338243 its reverse (3428331202), we get a palindrome (5449669445).

The spelling of 2021338243 in words is "two billion, twenty-one million, three hundred thirty-eight thousand, two hundred forty-three".