12211311021211 has 4 divisors (see below), whose sum is σ = 12214034940712. Its totient is φ = 12208587101712.

The previous prime is 12211311021113. The next prime is 12211311021227. The reversal of 12211311021211 is 11212011311221.

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 12211311021211 - 2⁴¹ = 10012287765659 is a prime.

It is a super-2 number, since 2×12211311021211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211311021911) 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, 1361953026 + ... + 1361961991.

It is an arithmetic number, because the mean of its divisors is an integer number (3053508735178).

Almost surely, 2^{12211311021211} is an apocalyptic number.

12211311021211 is a deficient number, since it is larger than the sum of its proper divisors (2723919501).

12211311021211 is an equidigital number, since it uses as much as digits as its factorization.

12211311021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723919500.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 12211311021211 its reverse (11212011311221), we get a palindrome (23423322332432).

The spelling of 12211311021211 in words is "twelve trillion, two hundred eleven billion, three hundred eleven million, twenty-one thousand, two hundred eleven".