12012100212111 has 4 divisors (see below), whose sum is σ = 16016133616152. Its totient is φ = 8008066808072.

The previous prime is 12012100212097. The next prime is 12012100212139. The reversal of 12012100212111 is 11121200121021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12012100212111 - 2¹¹ = 12012100210063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012100217111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2002016702016 + ... + 2002016702021.

It is an arithmetic number, because the mean of its divisors is an integer number (4004033404038).

Almost surely, 2^{12012100212111} is an apocalyptic number.

12012100212111 is a deficient number, since it is larger than the sum of its proper divisors (4004033404041).

12012100212111 is an equidigital number, since it uses as much as digits as its factorization.

12012100212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004033404040.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12012100212111 its reverse (11121200121021), we get a palindrome (23133300333132).

The spelling of 12012100212111 in words is "twelve trillion, twelve billion, one hundred million, two hundred twelve thousand, one hundred eleven".