11521144241 has 4 divisors (see below), whose sum is σ = 11789077872. Its totient is φ = 11253210612.

The previous prime is 11521144211. The next prime is 11521144339. The reversal of 11521144241 is 14244112511.

It is a happy number.

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: 14244112511 = 5689 ⋅2503799.

It is a cyclic number.

It is not a de Polignac number, because 11521144241 - 2¹⁴ = 11521127857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11521144241.

It is not an unprimeable number, because it can be changed into a prime (11521144211) 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, 133966751 + ... + 133966836.

It is an arithmetic number, because the mean of its divisors is an integer number (2947269468).

Almost surely, 2^11521144241 is an apocalyptic number.

It is an amenable number.

11521144241 is a deficient number, since it is larger than the sum of its proper divisors (267933631).

11521144241 is an equidigital number, since it uses as much as digits as its factorization.

11521144241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267933630.

The product of its digits is 1280, while the sum is 26.

Adding to 11521144241 its reverse (14244112511), we get a palindrome (25765256752).

The spelling of 11521144241 in words is "eleven billion, five hundred twenty-one million, one hundred forty-four thousand, two hundred forty-one".