12011103013121 has 4 divisors (see below), whose sum is σ = 12011109944532. Its totient is φ = 12011096081712.

The previous prime is 12011103013093. The next prime is 12011103013199. The reversal of 12011103013121 is 12131030111021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5118566880625 + 6892536132496 = 2262425^2 + 2625364^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011103013121 - 2⁶ = 12011103013057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12011103013121.

It is not an unprimeable number, because it can be changed into a prime (12011103010121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1728575 + ... + 5197131.

It is an arithmetic number, because the mean of its divisors is an integer number (3002777486133).

Almost surely, 2^{12011103013121} is an apocalyptic number.

It is an amenable number.

12011103013121 is a deficient number, since it is larger than the sum of its proper divisors (6931411).

12011103013121 is an equidigital number, since it uses as much as digits as its factorization.

12011103013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6931410.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 12011103013121 its reverse (12131030111021), we get a palindrome (24142133124142).

The spelling of 12011103013121 in words is "twelve trillion, eleven billion, one hundred three million, thirteen thousand, one hundred twenty-one".