12012111121121 has 2 divisors, whose sum is σ = 12012111121122. Its totient is φ = 12012111121120.

The previous prime is 12012111121117. The next prime is 12012111121133. The reversal of 12012111121121 is 12112111121021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11385225640000 + 626885481121 = 3374200^2 + 791761^2 .

It is an emirp because it is prime and its reverse (12112111121021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12012111121121 - 2² = 12012111121117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12012111121121.

It is not a weakly prime, because it can be changed into another prime (12012111121111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006055560560 + 6006055560561.

It is an arithmetic number, because the mean of its divisors is an integer number (6006055560561).

Almost surely, 2^{12012111121121} is an apocalyptic number.

It is an amenable number.

12012111121121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012111121121 is an equidigital number, since it uses as much as digits as its factorization.

12012111121121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 12012111121121 its reverse (12112111121021), we get a palindrome (24124222242142).

The spelling of 12012111121121 in words is "twelve trillion, twelve billion, one hundred eleven million, one hundred twenty-one thousand, one hundred twenty-one".