12111042241 has 4 divisors (see below), whose sum is σ = 12111758932. Its totient is φ = 12110325552.

The previous prime is 12111042221. The next prime is 12111042247. The reversal of 12111042241 is 14224011121.

It is a happy number.

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 9466511616 + 2644530625 = 97296^2 + 51425^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111042241 - 2²¹ = 12108945089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111042247) 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, 332370 + ... + 367003.

It is an arithmetic number, because the mean of its divisors is an integer number (3027939733).

Almost surely, 2^12111042241 is an apocalyptic number.

It is an amenable number.

12111042241 is a deficient number, since it is larger than the sum of its proper divisors (716691).

12111042241 is an equidigital number, since it uses as much as digits as its factorization.

12111042241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716690.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12111042241 its reverse (14224011121), we get a palindrome (26335053362).

It can be divided in two parts, 12 and 111042241, that added together give a triangular number (111042253 = T₁₄₉₀₂).

The spelling of 12111042241 in words is "twelve billion, one hundred eleven million, forty-two thousand, two hundred forty-one".