12112120121 has 2 divisors, whose sum is σ = 12112120122. Its totient is φ = 12112120120.

The previous prime is 12112120109. The next prime is 12112120127. The reversal of 12112120121 is 12102121121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11248935721 + 863184400 = 106061^2 + 29380^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112120121 - 2¹⁸ = 12111857977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12112120096 and 12112120105.

It is not a weakly prime, because it can be changed into another prime (12112120127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056060060 + 6056060061.

It is an arithmetic number, because the mean of its divisors is an integer number (6056060061).

Almost surely, 2^12112120121 is an apocalyptic number.

It is an amenable number.

12112120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112120121 is an equidigital number, since it uses as much as digits as its factorization.

12112120121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12112120121 its reverse (12102121121), we get a palindrome (24214241242).

The spelling of 12112120121 in words is "twelve billion, one hundred twelve million, one hundred twenty thousand, one hundred twenty-one".