12110121211 has 4 divisors (see below), whose sum is σ = 12110451472. Its totient is φ = 12109790952.

The previous prime is 12110121193. The next prime is 12110121227. The reversal of 12110121211 is 11212101121.

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 12110121211 - 2⁷ = 12110121083 is a prime.

It is a super-2 number, since 2×12110121211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12110121191 and 12110121200.

It is not an unprimeable number, because it can be changed into a prime (12110121271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102111 + ... + 186136.

It is an arithmetic number, because the mean of its divisors is an integer number (3027612868).

Almost surely, 2^12110121211 is an apocalyptic number.

12110121211 is a deficient number, since it is larger than the sum of its proper divisors (330261).

12110121211 is an equidigital number, since it uses as much as digits as its factorization.

12110121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330260.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12110121211 its reverse (11212101121), we get a palindrome (23322222332).

The spelling of 12110121211 in words is "twelve billion, one hundred ten million, one hundred twenty-one thousand, two hundred eleven".