221201101105 has 4 divisors (see below), whose sum is σ = 265441321332. Its totient is φ = 176960880880.

The previous prime is 221201101097. The next prime is 221201101139. The reversal of 221201101105 is 501101102122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501101102122 = 2 ⋅250550551061.

It can be written as a sum of positive squares in 2 ways, for example, as 70262635041 + 150938466064 = 265071^2 + 388508^2 .

It is not a de Polignac number, because 221201101105 - 2³ = 221201101097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 22120110106 + ... + 22120110115.

It is an arithmetic number, because the mean of its divisors is an integer number (66360330333).

Almost surely, 2^221201101105 is an apocalyptic number.

It is an amenable number.

221201101105 is a deficient number, since it is larger than the sum of its proper divisors (44240220227).

221201101105 is an equidigital number, since it uses as much as digits as its factorization.

221201101105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44240220226.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 221201101105 its reverse (501101102122), we get a palindrome (722302203227).

The spelling of 221201101105 in words is "two hundred twenty-one billion, two hundred one million, one hundred one thousand, one hundred five".