221809969103 has 2 divisors, whose sum is σ = 221809969104. Its totient is φ = 221809969102.

The previous prime is 221809969079. The next prime is 221809969187. The reversal of 221809969103 is 301969908122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221809969103 - 2¹⁸ = 221809706959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221809969193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110904984551 + 110904984552.

It is an arithmetic number, because the mean of its divisors is an integer number (110904984552).

Almost surely, 2^221809969103 is an apocalyptic number.

221809969103 is a deficient number, since it is larger than the sum of its proper divisors (1).

221809969103 is an equidigital number, since it uses as much as digits as its factorization.

221809969103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 221809969103 in words is "two hundred twenty-one billion, eight hundred nine million, nine hundred sixty-nine thousand, one hundred three".