221440120441 has 4 divisors (see below), whose sum is σ = 222587478772. Its totient is φ = 220292762112.

The previous prime is 221440120357. The next prime is 221440120457. The reversal of 221440120441 is 144021044122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 144021044122 = 2 ⋅72010522061.

It can be written as a sum of positive squares in 2 ways, for example, as 81267755625 + 140172364816 = 285075^2 + 374396^2 .

It is a cyclic number.

It is not a de Polignac number, because 221440120441 - 2³¹ = 219292636793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221440120141) 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, 573678876 + ... + 573679261.

It is an arithmetic number, because the mean of its divisors is an integer number (55646869693).

Almost surely, 2^221440120441 is an apocalyptic number.

It is an amenable number.

221440120441 is a deficient number, since it is larger than the sum of its proper divisors (1147358331).

221440120441 is a wasteful number, since it uses less digits than its factorization.

221440120441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147358330.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 221440120441 its reverse (144021044122), we get a palindrome (365461164563).

The spelling of 221440120441 in words is "two hundred twenty-one billion, four hundred forty million, one hundred twenty thousand, four hundred forty-one".