221321320320103 has 2 divisors, whose sum is σ = 221321320320104. Its totient is φ = 221321320320102.

The previous prime is 221321320320101. The next prime is 221321320320131. The reversal of 221321320320103 is 301023023123122.

221321320320103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221321320320103 - 2¹ = 221321320320101 is a prime.

Together with 221321320320101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221321320320101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110660660160051 + 110660660160052.

It is an arithmetic number, because the mean of its divisors is an integer number (110660660160052).

Almost surely, 2^{221321320320103} is an apocalyptic number.

221321320320103 is a deficient number, since it is larger than the sum of its proper divisors (1).

221321320320103 is an equidigital number, since it uses as much as digits as its factorization.

221321320320103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 221321320320103 its reverse (301023023123122), we get a palindrome (522344343443225).

The spelling of 221321320320103 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, three hundred twenty million, three hundred twenty thousand, one hundred three".