221321310103 has 2 divisors, whose sum is σ = 221321310104. Its totient is φ = 221321310102.

The previous prime is 221321310079. The next prime is 221321310169. The reversal of 221321310103 is 301013123122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221321310103 - 2¹⁷ = 221321179031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221321310803) 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, 110660655051 + 110660655052.

It is an arithmetic number, because the mean of its divisors is an integer number (110660655052).

Almost surely, 2^221321310103 is an apocalyptic number.

221321310103 is a deficient number, since it is larger than the sum of its proper divisors (1).

221321310103 is an equidigital number, since it uses as much as digits as its factorization.

221321310103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 221321310103 its reverse (301013123122), we get a palindrome (522334433225).

The spelling of 221321310103 in words is "two hundred twenty-one billion, three hundred twenty-one million, three hundred ten thousand, one hundred three".