12112120109 has 2 divisors, whose sum is σ = 12112120110. Its totient is φ = 12112120108.

The previous prime is 12112120099. The next prime is 12112120121. The reversal of 12112120109 is 90102121121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9209281225 + 2902838884 = 95965^2 + 53878^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112120109 - 2¹² = 12112116013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12112128109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056060054 + 6056060055.

It is an arithmetic number, because the mean of its divisors is an integer number (6056060055).

Almost surely, 2^12112120109 is an apocalyptic number.

It is an amenable number.

12112120109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112120109 is an equidigital number, since it uses as much as digits as its factorization.

12112120109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 12112120109 in words is "twelve billion, one hundred twelve million, one hundred twenty thousand, one hundred nine".