441111221 has 4 divisors (see below), whose sum is σ = 442375500. Its totient is φ = 439846944.

The previous prime is 441111197. The next prime is 441111233. The reversal of 441111221 is 122111144.

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 275062225 + 166048996 = 16585^2 + 12886^2 .

It is a cyclic number.

It is not a de Polignac number, because 441111221 - 2²² = 436916917 is a prime.

It is a super-2 number, since 2×441111221² = 389158218584221682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 441111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441110221) 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, 631616 + ... + 632313.

It is an arithmetic number, because the mean of its divisors is an integer number (110593875).

Almost surely, 2^441111221 is an apocalyptic number.

It is an amenable number.

441111221 is a deficient number, since it is larger than the sum of its proper divisors (1264279).

441111221 is a wasteful number, since it uses less digits than its factorization.

441111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264278.

The product of its digits is 64, while the sum is 17.

The square root of 441111221 is about 21002.6479521036. The cubic root of 441111221 is about 761.2302448940.

Adding to 441111221 its reverse (122111144), we get a palindrome (563222365).

The spelling of 441111221 in words is "four hundred forty-one million, one hundred eleven thousand, two hundred twenty-one".