12122009989 has 2 divisors, whose sum is σ = 12122009990. Its totient is φ = 12122009988.

The previous prime is 12122009983. The next prime is 12122010071. The reversal of 12122009989 is 98990022121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10397269089 + 1724740900 = 101967^2 + 41530^2 .

It is an emirp because it is prime and its reverse (98990022121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12122009989 - 2¹¹ = 12122007941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122009983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061004994 + 6061004995.

It is an arithmetic number, because the mean of its divisors is an integer number (6061004995).

Almost surely, 2^12122009989 is an apocalyptic number.

It is an amenable number.

12122009989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122009989 is an equidigital number, since it uses as much as digits as its factorization.

12122009989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 43.

The spelling of 12122009989 in words is "twelve billion, one hundred twenty-two million, nine thousand, nine hundred eighty-nine".