11525211121 has 4 divisors (see below), whose sum is σ = 12131801200. Its totient is φ = 10918621044.

The previous prime is 11525211053. The next prime is 11525211127. The reversal of 11525211121 is 12111252511.

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.

It is a cyclic number.

It is not a de Polignac number, because 11525211121 - 2³³ = 2935276529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11525211092 and 11525211101.

It is not an unprimeable number, because it can be changed into a prime (11525211127) 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, 303295011 + ... + 303295048.

It is an arithmetic number, because the mean of its divisors is an integer number (3032950300).

Almost surely, 2^11525211121 is an apocalyptic number.

It is an amenable number.

11525211121 is a deficient number, since it is larger than the sum of its proper divisors (606590079).

11525211121 is an equidigital number, since it uses as much as digits as its factorization.

11525211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606590078.

The product of its digits is 200, while the sum is 22.

Adding to 11525211121 its reverse (12111252511), we get a palindrome (23636463632).

The spelling of 11525211121 in words is "eleven billion, five hundred twenty-five million, two hundred eleven thousand, one hundred twenty-one".