12012111122111 has 8 divisors (see below), whose sum is σ = 12038349094464. Its totient is φ = 11985874417440.

The previous prime is 12012111122087. The next prime is 12012111122191. The reversal of 12012111122111 is 11122111121021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12012111122111 - 2¹⁸ = 12012110859967 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 12012111122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012111122191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20087045 + ... + 20676401.

It is an arithmetic number, because the mean of its divisors is an integer number (1504793636808).

Almost surely, 2^{12012111122111} is an apocalyptic number.

12012111122111 is a deficient number, since it is larger than the sum of its proper divisors (26237972353).

12012111122111 is an equidigital number, since it uses as much as digits as its factorization.

12012111122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633841.

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

Adding to 12012111122111 its reverse (11122111121021), we get a palindrome (23134222243132).

The spelling of 12012111122111 in words is "twelve trillion, twelve billion, one hundred eleven million, one hundred twenty-two thousand, one hundred eleven".