12112112020121 has 2 divisors, whose sum is σ = 12112112020122. Its totient is φ = 12112112020120.

The previous prime is 12112112020051. The next prime is 12112112020187. The reversal of 12112112020121 is 12102021121121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11057719849225 + 1054392170896 = 3325315^2 + 1026836^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112112020121 - 2²² = 12112107825817 is a prime.

It is a super-2 number, since 2×12112112020121² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12112112020121.

It is not a weakly prime, because it can be changed into another prime (12112112020321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056056010060 + 6056056010061.

It is an arithmetic number, because the mean of its divisors is an integer number (6056056010061).

Almost surely, 2^{12112112020121} is an apocalyptic number.

It is an amenable number.

12112112020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112112020121 is an equidigital number, since it uses as much as digits as its factorization.

12112112020121 is an evil number, because the sum of its binary digits is even.

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

Adding to 12112112020121 its reverse (12102021121121), we get a palindrome (24214133141242).

The spelling of 12112112020121 in words is "twelve trillion, one hundred twelve billion, one hundred twelve million, twenty thousand, one hundred twenty-one".