12112121020121 has 4 divisors (see below), whose sum is σ = 12153459317412. Its totient is φ = 12070782722832.

The previous prime is 12112121020099. The next prime is 12112121020313. The reversal of 12112121020121 is 12102012121121.

12112121020121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6426280770121 + 5685840250000 = 2535011^2 + 2384500^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112121020121 - 2²⁶ = 12112053911257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12112121020121.

It is not an unprimeable number, because it can be changed into a prime (12112121020621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20669148206 + ... + 20669148791.

It is an arithmetic number, because the mean of its divisors is an integer number (3038364829353).

Almost surely, 2^{12112121020121} is an apocalyptic number.

It is an amenable number.

12112121020121 is a deficient number, since it is larger than the sum of its proper divisors (41338297291).

12112121020121 is an equidigital number, since it uses as much as digits as its factorization.

12112121020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41338297290.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12112121020121 its reverse (12102012121121), we get a palindrome (24214133141242).

The spelling of 12112121020121 in words is "twelve trillion, one hundred twelve billion, one hundred twenty-one million, twenty thousand, one hundred twenty-one".