12121212209999 has 2 divisors, whose sum is σ = 12121212210000. Its totient is φ = 12121212209998.

The previous prime is 12121212209989. The next prime is 12121212210007. The reversal of 12121212209999 is 99990221212121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12121212209999 - 2¹⁶ = 12121212144463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121212209959) 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, 6060606104999 + 6060606105000.

It is an arithmetic number, because the mean of its divisors is an integer number (6060606105000).

Almost surely, 2^{12121212209999} is an apocalyptic number.

12121212209999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121212209999 is an equidigital number, since it uses as much as digits as its factorization.

12121212209999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 50.

The spelling of 12121212209999 in words is "twelve trillion, one hundred twenty-one billion, two hundred twelve million, two hundred nine thousand, nine hundred ninety-nine".