12211022121211 has 4 divisors (see below), whose sum is σ = 12211030245424. Its totient is φ = 12211013997000.

The previous prime is 12211022121203. The next prime is 12211022121223. The reversal of 12211022121211 is 11212122011221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12211022121211 - 2³ = 12211022121203 is a prime.

It is a super-3 number, since 3×12211022121211³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211022121611) 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, 1075680 + ... + 5057581.

It is an arithmetic number, because the mean of its divisors is an integer number (3052757561356).

Almost surely, 2^{12211022121211} is an apocalyptic number.

12211022121211 is a deficient number, since it is larger than the sum of its proper divisors (8124213).

12211022121211 is an equidigital number, since it uses as much as digits as its factorization.

12211022121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8124212.

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

Adding to 12211022121211 its reverse (11212122011221), we get a palindrome (23423144132432).

The spelling of 12211022121211 in words is "twelve trillion, two hundred eleven billion, twenty-two million, one hundred twenty-one thousand, two hundred eleven".