12012111121211 has 8 divisors (see below), whose sum is σ = 12167203761600. Its totient is φ = 11857094496000.

The previous prime is 12012111121187. The next prime is 12012111121243. The reversal of 12012111121211 is 11212111121021.

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 12012111121211 - 2⁶ = 12012111121147 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 12012111121211.

It is not an unprimeable number, because it can be changed into a prime (12012111121261) 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, 18685676 + ... + 19317833.

It is an arithmetic number, because the mean of its divisors is an integer number (1520900470200).

Almost surely, 2^{12012111121211} is an apocalyptic number.

12012111121211 is a deficient number, since it is larger than the sum of its proper divisors (155092640389).

12012111121211 is an equidigital number, since it uses as much as digits as its factorization.

12012111121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38007589.

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

Adding to 12012111121211 its reverse (11212111121021), we get a palindrome (23224222242232).

The spelling of 12012111121211 in words is "twelve trillion, twelve billion, one hundred eleven million, one hundred twenty-one thousand, two hundred eleven".