221105441 has 4 divisors (see below), whose sum is σ = 226247472. Its totient is φ = 215963412.

The previous prime is 221105369. The next prime is 221105449. The reversal of 221105441 is 144501122.

It is a happy number.

221105441 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221105441 - 2¹⁰ = 221104417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221105449) 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, 2570951 + ... + 2571036.

It is an arithmetic number, because the mean of its divisors is an integer number (56561868).

Almost surely, 2^221105441 is an apocalyptic number.

It is an amenable number.

221105441 is a deficient number, since it is larger than the sum of its proper divisors (5142031).

221105441 is an equidigital number, since it uses as much as digits as its factorization.

221105441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5142030.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 221105441 is about 14869.6146890227. The cubic root of 221105441 is about 604.6904967025.

Adding to 221105441 its reverse (144501122), we get a palindrome (365606563).

The spelling of 221105441 in words is "two hundred twenty-one million, one hundred five thousand, four hundred forty-one".