221100441 has 8 divisors (see below), whose sum is σ = 295948704. Its totient is φ = 146826240.

The previous prime is 221100421. The next prime is 221100443. The reversal of 221100441 is 144001122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221100441 - 2¹⁵ = 221067673 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221100441.

It is not an unprimeable number, because it can be changed into a prime (221100443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142615 + ... + 144156.

It is an arithmetic number, because the mean of its divisors is an integer number (36993588).

Almost surely, 2^221100441 is an apocalyptic number.

It is an amenable number.

221100441 is a deficient number, since it is larger than the sum of its proper divisors (74848263).

221100441 is a wasteful number, since it uses less digits than its factorization.

221100441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287031.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 221100441 is about 14869.4465599766. The cubic root of 221100441 is about 604.6859385827.

Adding to 221100441 its reverse (144001122), we get a palindrome (365101563).

The spelling of 221100441 in words is "two hundred twenty-one million, one hundred thousand, four hundred forty-one".