221300011243 has 2 divisors, whose sum is σ = 221300011244. Its totient is φ = 221300011242.

The previous prime is 221300011217. The next prime is 221300011279. The reversal of 221300011243 is 342110003122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221300011243 - 2⁵ = 221300011211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221300011243.

It is not a weakly prime, because it can be changed into another prime (221300015243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110650005621 + 110650005622.

It is an arithmetic number, because the mean of its divisors is an integer number (110650005622).

Almost surely, 2^221300011243 is an apocalyptic number.

221300011243 is a deficient number, since it is larger than the sum of its proper divisors (1).

221300011243 is an equidigital number, since it uses as much as digits as its factorization.

221300011243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221300011243 its reverse (342110003122), we get a palindrome (563410014365).

The spelling of 221300011243 in words is "two hundred twenty-one billion, three hundred million, eleven thousand, two hundred forty-three".