12112121131211 has 4 divisors (see below), whose sum is σ = 12112130793624. Its totient is φ = 12112111468800.

The previous prime is 12112121131189. The next prime is 12112121131261. The reversal of 12112121131211 is 11213112121121.

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 12112121131211 - 2²⁶ = 12112054022347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12112121131261) 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, 2610725 + ... + 5571366.

It is an arithmetic number, because the mean of its divisors is an integer number (3028032698406).

Almost surely, 2^{12112121131211} is an apocalyptic number.

12112121131211 is a deficient number, since it is larger than the sum of its proper divisors (9662413).

12112121131211 is an equidigital number, since it uses as much as digits as its factorization.

12112121131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9662412.

The product of its digits is 48, while the sum is 20.

Adding to 12112121131211 its reverse (11213112121121), we get a palindrome (23325233252332).

The spelling of 12112121131211 in words is "twelve trillion, one hundred twelve billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred eleven".