11531421041 has 4 divisors (see below), whose sum is σ = 13178766912. Its totient is φ = 9884075172.

The previous prime is 11531421023. The next prime is 11531421047. The reversal of 11531421041 is 14012413511.

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.

It is a cyclic number.

It is not a de Polignac number, because 11531421041 - 2²⁶ = 11464312177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11531420998 and 11531421016.

It is not an unprimeable number, because it can be changed into a prime (11531421047) 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, 823672925 + ... + 823672938.

It is an arithmetic number, because the mean of its divisors is an integer number (3294691728).

Almost surely, 2^11531421041 is an apocalyptic number.

It is an amenable number.

11531421041 is a deficient number, since it is larger than the sum of its proper divisors (1647345871).

11531421041 is an equidigital number, since it uses as much as digits as its factorization.

11531421041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647345870.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 11531421041 its reverse (14012413511), we get a palindrome (25543834552).

The spelling of 11531421041 in words is "eleven billion, five hundred thirty-one million, four hundred twenty-one thousand, forty-one".