12012121121111 has 2 divisors, whose sum is σ = 12012121121112. Its totient is φ = 12012121121110.

The previous prime is 12012121121083. The next prime is 12012121121149. The reversal of 12012121121111 is 11112112121021.

It is a weak prime.

It is an emirp because it is prime and its reverse (11112112121021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12012121121111 - 2³⁴ = 11994941251927 is a prime.

It is a super-3 number, since 3×12012121121111³ (a number of 40 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12012121121111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12012121121911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006060560555 + 6006060560556.

It is an arithmetic number, because the mean of its divisors is an integer number (6006060560556).

Almost surely, 2^{12012121121111} is an apocalyptic number.

12012121121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012121121111 is an equidigital number, since it uses as much as digits as its factorization.

12012121121111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 12012121121111 its reverse (11112112121021), we get a palindrome (23124233242132).

The spelling of 12012121121111 in words is "twelve trillion, twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred eleven".