12121110211 has 32 divisors (see below), whose sum is σ = 15455232000. Its totient is φ = 9254310912.

The previous prime is 12121110191. The next prime is 12121110247. The reversal of 12121110211 is 11201112121.

It is a happy number.

It is not a de Polignac number, because 12121110211 - 2¹⁵ = 12121077443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12121110191 and 12121110200.

It is not an unprimeable number, because it can be changed into a prime (12121110611) 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 31 ways as a sum of consecutive naturals, for example, 2912350 + ... + 2916508.

It is an arithmetic number, because the mean of its divisors is an integer number (482976000).

Almost surely, 2^12121110211 is an apocalyptic number.

12121110211 is a deficient number, since it is larger than the sum of its proper divisors (3334121789).

12121110211 is a wasteful number, since it uses less digits than its factorization.

12121110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491.

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

Adding to 12121110211 its reverse (11201112121), we get a palindrome (23322222332).

The spelling of 12121110211 in words is "twelve billion, one hundred twenty-one million, one hundred ten thousand, two hundred eleven".