12011012121111 has 16 divisors (see below), whose sum is σ = 16553103688320. Its totient is φ = 7742580743520.

The previous prime is 12011012121089. The next prime is 12011012121133. The reversal of 12011012121111 is 11112121011021.

It is an interprime number because it is at equal distance from previous prime (12011012121089) and next prime (12011012121133).

It is not a de Polignac number, because 12011012121111 - 2²³ = 12011003732503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011012123111) 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 15 ways as a sum of consecutive naturals, for example, 556209085 + ... + 556230678.

It is an arithmetic number, because the mean of its divisors is an integer number (1034568980520).

Almost surely, 2^{12011012121111} is an apocalyptic number.

12011012121111 is a deficient number, since it is larger than the sum of its proper divisors (4542091567209).

12011012121111 is a wasteful number, since it uses less digits than its factorization.

12011012121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112439886.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12011012121111 its reverse (11112121011021), we get a palindrome (23123133132132).

The spelling of 12011012121111 in words is "twelve trillion, eleven billion, twelve million, one hundred twenty-one thousand, one hundred eleven".