221321602103123 has 2 divisors, whose sum is σ = 221321602103124. Its totient is φ = 221321602103122.

The previous prime is 221321602103009. The next prime is 221321602103149. The reversal of 221321602103123 is 321301206123122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221321602103123 - 2¹⁶ = 221321602037587 is a prime.

It is not a weakly prime, because it can be changed into another prime (221321602103183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110660801051561 + 110660801051562.

It is an arithmetic number, because the mean of its divisors is an integer number (110660801051562).

Almost surely, 2^{221321602103123} is an apocalyptic number.

221321602103123 is a deficient number, since it is larger than the sum of its proper divisors (1).

221321602103123 is an equidigital number, since it uses as much as digits as its factorization.

221321602103123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 221321602103123 its reverse (321301206123122), we get a palindrome (542622808226245).

The spelling of 221321602103123 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, six hundred two million, one hundred three thousand, one hundred twenty-three".