12001109 has 2 divisors, whose sum is σ = 12001110. Its totient is φ = 12001108.

The previous prime is 12001097. The next prime is 12001111. The reversal of 12001109 is 90110021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6360484 + 5640625 = 2522^2 + 2375^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001109 - 2²⁰ = 10952533 is a prime.

Together with 12001111, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001093 and 12001102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12001139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000554 + 6000555.

It is an arithmetic number, because the mean of its divisors is an integer number (6000555).

Almost surely, 2^12001109 is an apocalyptic number.

It is an amenable number.

12001109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001109 is an equidigital number, since it uses as much as digits as its factorization.

12001109 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 12001109 is about 3464.2616818018. The cubic root of 12001109 is about 228.9499010051.

The spelling of 12001109 in words is "twelve million, one thousand, one hundred nine".