12112121129 has 2 divisors, whose sum is σ = 12112121130. Its totient is φ = 12112121128.

The previous prime is 12112121101. The next prime is 12112121137. The reversal of 12112121129 is 92112121121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8888152729 + 3223968400 = 94277^2 + 56780^2 .

It is an emirp because it is prime and its reverse (92112121121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12112121129 - 2¹² = 12112117033 is a prime.

It is not a weakly prime, because it can be changed into another prime (12112121029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056060564 + 6056060565.

It is an arithmetic number, because the mean of its divisors is an integer number (6056060565).

Almost surely, 2^12112121129 is an apocalyptic number.

It is an amenable number.

12112121129 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112121129 is an equidigital number, since it uses as much as digits as its factorization.

12112121129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 23.

The spelling of 12112121129 in words is "twelve billion, one hundred twelve million, one hundred twenty-one thousand, one hundred twenty-nine".