221102221208101 has 2 divisors, whose sum is σ = 221102221208102. Its totient is φ = 221102221208100.

The previous prime is 221102221208051. The next prime is 221102221208123. The reversal of 221102221208101 is 101802122201122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220293572444100 + 808648764001 = 14842290^2 + 899249^2 .

It is a cyclic number.

It is not a de Polignac number, because 221102221208101 - 2⁴⁵ = 185917849119269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221102221208191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110551110604050 + 110551110604051.

It is an arithmetic number, because the mean of its divisors is an integer number (110551110604051).

Almost surely, 2^{221102221208101} is an apocalyptic number.

It is an amenable number.

221102221208101 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102221208101 is an equidigital number, since it uses as much as digits as its factorization.

221102221208101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 25.

Adding to 221102221208101 its reverse (101802122201122), we get a palindrome (322904343409223).

The spelling of 221102221208101 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred twenty-one million, two hundred eight thousand, one hundred one".