12120211212211 has 4 divisors (see below), whose sum is σ = 12122587263424. Its totient is φ = 12117835161000.

The previous prime is 12120211212167. The next prime is 12120211212229. The reversal of 12120211212211 is 11221211202121.

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 12120211212211 - 2⁹ = 12120211211699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120211212911) 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 in 3 ways as a sum of consecutive naturals, for example, 1188017955 + ... + 1188028156.

It is an arithmetic number, because the mean of its divisors is an integer number (3030646815856).

Almost surely, 2^{12120211212211} is an apocalyptic number.

12120211212211 is a deficient number, since it is larger than the sum of its proper divisors (2376051213).

12120211212211 is an equidigital number, since it uses as much as digits as its factorization.

12120211212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376051212.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12120211212211 its reverse (11221211202121), we get a palindrome (23341422414332).

The spelling of 12120211212211 in words is "twelve trillion, one hundred twenty billion, two hundred eleven million, two hundred twelve thousand, two hundred eleven".