131440741721 has 8 divisors (see below), whose sum is σ = 133687062600. Its totient is φ = 129212610048.

The previous prime is 131440741699. The next prime is 131440741753. The reversal of 131440741721 is 127147044131.

It can be written as a sum of positive squares in 4 ways, for example, as 22035918025 + 109404823696 = 148445^2 + 330764^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131440741721 - 2²⁶ = 131373632857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131440741781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4532726 + ... + 4561631.

It is an arithmetic number, because the mean of its divisors is an integer number (16710882825).

Almost surely, 2^131440741721 is an apocalyptic number.

It is an amenable number.

131440741721 is a deficient number, since it is larger than the sum of its proper divisors (2246320879).

131440741721 is an equidigital number, since it uses as much as digits as its factorization.

131440741721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9094603.

The product of its (nonzero) digits is 18816, while the sum is 35.

Adding to 131440741721 its reverse (127147044131), we get a palindrome (258587785852).

The spelling of 131440741721 in words is "one hundred thirty-one billion, four hundred forty million, seven hundred forty-one thousand, seven hundred twenty-one".