113240444221 has 4 divisors (see below), whose sum is σ = 113241333244. Its totient is φ = 113239555200.

The previous prime is 113240444203. The next prime is 113240444231. The reversal of 113240444221 is 122444042311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 122444042311 = 25741 ⋅4756771.

It can be written as a sum of positive squares in 2 ways, for example, as 97063402500 + 16177041721 = 311550^2 + 127189^2 .

It is a cyclic number.

It is not a de Polignac number, because 113240444221 - 2¹⁷ = 113240313149 is a prime.

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 113240444221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113240444231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213390 + ... + 521551.

It is an arithmetic number, because the mean of its divisors is an integer number (28310333311).

Almost surely, 2^113240444221 is an apocalyptic number.

It is an amenable number.

113240444221 is a deficient number, since it is larger than the sum of its proper divisors (889023).

113240444221 is an equidigital number, since it uses as much as digits as its factorization.

113240444221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889022.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 113240444221 its reverse (122444042311), we get a palindrome (235684486532).

The spelling of 113240444221 in words is "one hundred thirteen billion, two hundred forty million, four hundred forty-four thousand, two hundred twenty-one".