221533612441105 has 4 divisors (see below), whose sum is σ = 265840334929332. Its totient is φ = 177226889952880.

The previous prime is 221533612441087. The next prime is 221533612441109. The reversal of 221533612441105 is 501144216335122.

221533612441105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22249598434704 + 199284014006401 = 4716948^2 + 14116799^2 .

It is a de Polignac number, because none of the positive numbers 2^k-221533612441105 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221533612441109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22153361244106 + ... + 22153361244115.

It is an arithmetic number, because the mean of its divisors is an integer number (66460083732333).

Almost surely, 2^{221533612441105} is an apocalyptic number.

It is an amenable number.

221533612441105 is a deficient number, since it is larger than the sum of its proper divisors (44306722488227).

221533612441105 is an equidigital number, since it uses as much as digits as its factorization.

221533612441105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44306722488226.

The product of its (nonzero) digits is 172800, while the sum is 40.

Adding to 221533612441105 its reverse (501144216335122), we get a palindrome (722677828776227).

The spelling of 221533612441105 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, six hundred twelve million, four hundred forty-one thousand, one hundred five".