221242103 has 2 divisors, whose sum is σ = 221242104. Its totient is φ = 221242102.

The previous prime is 221242051. The next prime is 221242127. The reversal of 221242103 is 301242122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221242103 - 2⁶ = 221242039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221242003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110621051 + 110621052.

It is an arithmetic number, because the mean of its divisors is an integer number (110621052).

Almost surely, 2^221242103 is an apocalyptic number.

221242103 is a deficient number, since it is larger than the sum of its proper divisors (1).

221242103 is an equidigital number, since it uses as much as digits as its factorization.

221242103 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 221242103 is about 14874.2093235237. The cubic root of 221242103 is about 604.8150544585.

Adding to 221242103 its reverse (301242122), we get a palindrome (522484225).

The spelling of 221242103 in words is "two hundred twenty-one million, two hundred forty-two thousand, one hundred three".