2021201221243 has 2 divisors, whose sum is σ = 2021201221244. Its totient is φ = 2021201221242.

The previous prime is 2021201221199. The next prime is 2021201221271. The reversal of 2021201221243 is 3421221021202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021201221243 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021201221043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010600610621 + 1010600610622.

It is an arithmetic number, because the mean of its divisors is an integer number (1010600610622).

Almost surely, 2^{2021201221243} is an apocalyptic number.

2021201221243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021201221243 is an equidigital number, since it uses as much as digits as its factorization.

2021201221243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 2021201221243 its reverse (3421221021202), we get a palindrome (5442422242445).

The spelling of 2021201221243 in words is "two trillion, twenty-one billion, two hundred one million, two hundred twenty-one thousand, two hundred forty-three".