12121201129 has 2 divisors, whose sum is σ = 12121201130. Its totient is φ = 12121201128.

The previous prime is 12121201109. The next prime is 12121201163. The reversal of 12121201129 is 92110212121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6344441104 + 5776760025 = 79652^2 + 76005^2 .

It is an emirp because it is prime and its reverse (92110212121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12121201129 - 2²³ = 12112812521 is a prime.

It is not a weakly prime, because it can be changed into another prime (12121201109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060600564 + 6060600565.

It is an arithmetic number, because the mean of its divisors is an integer number (6060600565).

Almost surely, 2^12121201129 is an apocalyptic number.

It is an amenable number.

12121201129 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121201129 is an equidigital number, since it uses as much as digits as its factorization.

12121201129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 12121201129 in words is "twelve billion, one hundred twenty-one million, two hundred one thousand, one hundred twenty-nine".