12101009 has 2 divisors, whose sum is σ = 12101010. Its totient is φ = 12101008.

The previous prime is 12101003. The next prime is 12101021. The reversal of 12101009 is 90010121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12054784 + 46225 = 3472^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 12101009 - 2⁴ = 12100993 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12100984 and 12101002.

It is not a weakly prime, because it can be changed into another prime (12101003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050504 + 6050505.

It is an arithmetic number, because the mean of its divisors is an integer number (6050505).

Almost surely, 2^12101009 is an apocalyptic number.

It is an amenable number.

12101009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101009 is an equidigital number, since it uses as much as digits as its factorization.

12101009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 12101009 is about 3478.6504567145. The cubic root of 12101009 is about 229.5834236455.

The spelling of 12101009 in words is "twelve million, one hundred one thousand, nine".