12112111221121 has 2 divisors, whose sum is σ = 12112111221122. Its totient is φ = 12112111221120.

The previous prime is 12112111221059. The next prime is 12112111221143. The reversal of 12112111221121 is 12112211121121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10186719088896 + 1925392132225 = 3191664^2 + 1387585^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112111221121 - 2⁹ = 12112111220609 is a prime.

It is not a weakly prime, because it can be changed into another prime (12112111221151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056055610560 + 6056055610561.

It is an arithmetic number, because the mean of its divisors is an integer number (6056055610561).

Almost surely, 2^{12112111221121} is an apocalyptic number.

It is an amenable number.

12112111221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112111221121 is an equidigital number, since it uses as much as digits as its factorization.

12112111221121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32, while the sum is 19.

Adding to 12112111221121 its reverse (12112211121121), we get a palindrome (24224322342242).

The spelling of 12112111221121 in words is "twelve trillion, one hundred twelve billion, one hundred eleven million, two hundred twenty-one thousand, one hundred twenty-one".