221012441 has 4 divisors (see below), whose sum is σ = 238013412. Its totient is φ = 204011472.

The previous prime is 221012437. The next prime is 221012443. The reversal of 221012441 is 144210122.

221012441 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 12816400 + 208196041 = 3580^2 + 14429^2 .

It is a cyclic number.

It is not a de Polignac number, because 221012441 - 2² = 221012437 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221012443) 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, 8500466 + ... + 8500491.

It is an arithmetic number, because the mean of its divisors is an integer number (59503353).

Almost surely, 2^221012441 is an apocalyptic number.

It is an amenable number.

221012441 is a deficient number, since it is larger than the sum of its proper divisors (17000971).

221012441 is a wasteful number, since it uses less digits than its factorization.

221012441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17000970.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 221012441 is about 14866.4871775413. The cubic root of 221012441 is about 604.6057044237.

Adding to 221012441 its reverse (144210122), we get a palindrome (365222563).

It can be divided in two parts, 22101 and 2441, that added together give a palindrome (24542).

The spelling of 221012441 in words is "two hundred twenty-one million, twelve thousand, four hundred forty-one".