221043105 has 12 divisors (see below), whose sum is σ = 383141460. Its totient is φ = 117889632.

The previous prime is 221043101. The next prime is 221043127. The reversal of 221043105 is 501340122.

221043105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 98962704 + 122080401 = 9948^2 + 11049^2 .

It is not a de Polignac number, because 221043105 - 2² = 221043101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221043101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2455990 + ... + 2456079.

It is an arithmetic number, because the mean of its divisors is an integer number (31928455).

Almost surely, 2^221043105 is an apocalyptic number.

It is an amenable number.

221043105 is a deficient number, since it is larger than the sum of its proper divisors (162098355).

221043105 is a wasteful number, since it uses less digits than its factorization.

221043105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4912080 (or 4912077 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 221043105 is about 14867.5184546716. The cubic root of 221043105 is about 604.6336647984.

Adding to 221043105 its reverse (501340122), we get a palindrome (722383227).

The spelling of 221043105 in words is "two hundred twenty-one million, forty-three thousand, one hundred five".