440121131131 has 4 divisors (see below), whose sum is σ = 480132143064. Its totient is φ = 400110119200.

The previous prime is 440121131039. The next prime is 440121131183. The reversal of 440121131131 is 131131121044.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-440121131131 is a prime.

It is a super-2 number, since 2×440121131131² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440121131231) 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, 20005505950 + ... + 20005505971.

It is an arithmetic number, because the mean of its divisors is an integer number (120033035766).

Almost surely, 2^440121131131 is an apocalyptic number.

440121131131 is a deficient number, since it is larger than the sum of its proper divisors (40011011933).

440121131131 is a wasteful number, since it uses less digits than its factorization.

440121131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40011011932.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 440121131131 its reverse (131131121044), we get a palindrome (571252252175).

The spelling of 440121131131 in words is "four hundred forty billion, one hundred twenty-one million, one hundred thirty-one thousand, one hundred thirty-one".