10131440321 has 4 divisors (see below), whose sum is σ = 10131782100. Its totient is φ = 10131098544.

The previous prime is 10131440317. The next prime is 10131440329. The reversal of 10131440321 is 12304413101.

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 2963278096 + 7168162225 = 54436^2 + 84665^2 .

It is a cyclic number.

It is not a de Polignac number, because 10131440321 - 2² = 10131440317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10131440293 and 10131440302.

It is not an unprimeable number, because it can be changed into a prime (10131440329) 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, 121706 + ... + 187283.

It is an arithmetic number, because the mean of its divisors is an integer number (2532945525).

Almost surely, 2^10131440321 is an apocalyptic number.

It is an amenable number.

10131440321 is a deficient number, since it is larger than the sum of its proper divisors (341779).

10131440321 is an equidigital number, since it uses as much as digits as its factorization.

10131440321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341778.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 10131440321 its reverse (12304413101), we get a palindrome (22435853422).

The spelling of 10131440321 in words is "ten billion, one hundred thirty-one million, four hundred forty thousand, three hundred twenty-one".