12020121121 has 6 divisors (see below), whose sum is σ = 12115529250. Its totient is φ = 11925458496.

The previous prime is 12020121097. The next prime is 12020121161. The reversal of 12020121121 is 12112102021.

12020121121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6962066721 + 5058054400 = 83439^2 + 71120^2 .

It is not a de Polignac number, because 12020121121 - 2¹¹ = 12020119073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020121161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 356496 + ... + 388753.

It is an arithmetic number, because the mean of its divisors is an integer number (2019254875).

Almost surely, 2^12020121121 is an apocalyptic number.

It is an amenable number.

12020121121 is a deficient number, since it is larger than the sum of its proper divisors (95408129).

12020121121 is an frugal number, since it uses more digits than its factorization.

12020121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745503 (or 745376 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12020121121 its reverse (12112102021), we get a palindrome (24132223142).

The spelling of 12020121121 in words is "twelve billion, twenty million, one hundred twenty-one thousand, one hundred twenty-one".