12212429 has 2 divisors, whose sum is σ = 12212430. Its totient is φ = 12212428.

The previous prime is 12212423. The next prime is 12212441. The reversal of 12212429 is 92421221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10176100 + 2036329 = 3190^2 + 1427^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212429 - 2⁴ = 12212413 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106214 + 6106215.

It is an arithmetic number, because the mean of its divisors is an integer number (6106215).

Almost surely, 2^12212429 is an apocalyptic number.

It is an amenable number.

12212429 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212429 is an equidigital number, since it uses as much as digits as its factorization.

12212429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

The square root of 12212429 is about 3494.6285925689. The cubic root of 12212429 is about 230.2859015516.

The spelling of 12212429 in words is "twelve million, two hundred twelve thousand, four hundred twenty-nine".