12121122229 has 2 divisors, whose sum is σ = 12121122230. Its totient is φ = 12121122228.

The previous prime is 12121122203. The next prime is 12121122239. The reversal of 12121122229 is 92222112121.

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., 9254055204 + 2867067025 = 96198^2 + 53545^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121122229 - 2¹¹ = 12121120181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121122239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060561114 + 6060561115.

It is an arithmetic number, because the mean of its divisors is an integer number (6060561115).

Almost surely, 2^12121122229 is an apocalyptic number.

It is an amenable number.

12121122229 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121122229 is an equidigital number, since it uses as much as digits as its factorization.

12121122229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 25.

The spelling of 12121122229 in words is "twelve billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty-nine".