11431081273 has 4 divisors (see below), whose sum is σ = 11436560640. Its totient is φ = 11425601908.

The previous prime is 11431081261. The next prime is 11431081289. The reversal of 11431081273 is 37218013411.

11431081273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37218013411 = 601 ⋅61926811.

It is a cyclic number.

It is not a de Polignac number, because 11431081273 - 2⁹ = 11431080761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11431081223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2736553 + ... + 2740726.

It is an arithmetic number, because the mean of its divisors is an integer number (2859140160).

Almost surely, 2^11431081273 is an apocalyptic number.

It is an amenable number.

11431081273 is a deficient number, since it is larger than the sum of its proper divisors (5479367).

11431081273 is an equidigital number, since it uses as much as digits as its factorization.

11431081273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5479366.

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 11431081273 its reverse (37218013411), we get a palindrome (48649094684).

The spelling of 11431081273 in words is "eleven billion, four hundred thirty-one million, eighty-one thousand, two hundred seventy-three".