12111211210211 has 4 divisors (see below), whose sum is σ = 12406606605624. Its totient is φ = 11815815814800.

The previous prime is 12111211210199. The next prime is 12111211210261. The reversal of 12111211210211 is 11201211211121.

12111211210211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12111211210211 - 2³⁴ = 12094031341027 is a prime.

It is a super-4 number, since 4×12111211210211⁴ (a number of 53 digits) contains 4444 as substring.

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 12111211210211.

It is not an unprimeable number, because it can be changed into a prime (12111211210261) 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, 147697697645 + ... + 147697697726.

It is an arithmetic number, because the mean of its divisors is an integer number (3101651651406).

Almost surely, 2^{12111211210211} is an apocalyptic number.

12111211210211 is a deficient number, since it is larger than the sum of its proper divisors (295395395413).

12111211210211 is an equidigital number, since it uses as much as digits as its factorization.

12111211210211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295395395412.

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

Adding to 12111211210211 its reverse (11201211211121), we get a palindrome (23312422421332).

The spelling of 12111211210211 in words is "twelve trillion, one hundred eleven billion, two hundred eleven million, two hundred ten thousand, two hundred eleven".