12121222100989 has 2 divisors, whose sum is σ = 12121222100990. Its totient is φ = 12121222100988.

The previous prime is 12121222100987. The next prime is 12121222101011. The reversal of 12121222100989 is 98900122212121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8888400120964 + 3232821980025 = 2981342^2 + 1798005^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121222100989 - 2¹ = 12121222100987 is a prime.

Together with 12121222100987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121222100987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060611050494 + 6060611050495.

It is an arithmetic number, because the mean of its divisors is an integer number (6060611050495).

Almost surely, 2^{12121222100989} is an apocalyptic number.

It is an amenable number.

12121222100989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121222100989 is an equidigital number, since it uses as much as digits as its factorization.

12121222100989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 40.

The spelling of 12121222100989 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred thousand, nine hundred eighty-nine".