2221001243 has 2 divisors, whose sum is σ = 2221001244. Its totient is φ = 2221001242.

The previous prime is 2221001207. The next prime is 2221001249. The reversal of 2221001243 is 3421001222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221001243 - 2⁶ = 2221001179 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221001249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110500621 + 1110500622.

It is an arithmetic number, because the mean of its divisors is an integer number (1110500622).

Almost surely, 2^2221001243 is an apocalyptic number.

2221001243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221001243 is an equidigital number, since it uses as much as digits as its factorization.

2221001243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2221001243 is about 47127.4998594239. The cubic root of 2221001243 is about 1304.7168380020.

Adding to 2221001243 its reverse (3421001222), we get a palindrome (5642002465).

The spelling of 2221001243 in words is "two billion, two hundred twenty-one million, one thousand, two hundred forty-three".