221221102103 has 2 divisors, whose sum is σ = 221221102104. Its totient is φ = 221221102102.

The previous prime is 221221102097. The next prime is 221221102183. The reversal of 221221102103 is 301201122122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221221102103 - 2⁴ = 221221102087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221221102183) 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, 110610551051 + 110610551052.

It is an arithmetic number, because the mean of its divisors is an integer number (110610551052).

Almost surely, 2^221221102103 is an apocalyptic number.

221221102103 is a deficient number, since it is larger than the sum of its proper divisors (1).

221221102103 is an equidigital number, since it uses as much as digits as its factorization.

221221102103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221221102103 its reverse (301201122122), we get a palindrome (522422224225).

The spelling of 221221102103 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, one hundred three".