12011130121 has 4 divisors (see below), whose sum is σ = 12011390100. Its totient is φ = 12010870144.

The previous prime is 12011130119. The next prime is 12011130161. The reversal of 12011130121 is 12103111021.

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 8896262400 + 3114867721 = 94320^2 + 55811^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011130121 - 2¹ = 12011130119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011130161) 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, 39856 + ... + 160033.

It is an arithmetic number, because the mean of its divisors is an integer number (3002847525).

Almost surely, 2^12011130121 is an apocalyptic number.

It is an amenable number.

12011130121 is a deficient number, since it is larger than the sum of its proper divisors (259979).

12011130121 is an equidigital number, since it uses as much as digits as its factorization.

12011130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259978.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 12011130121 its reverse (12103111021), we get a palindrome (24114241142).

The spelling of 12011130121 in words is "twelve billion, eleven million, one hundred thirty thousand, one hundred twenty-one".