12011009 has 2 divisors, whose sum is σ = 12011010. Its totient is φ = 12011008.

The previous prime is 12010963. The next prime is 12011029. The reversal of 12011009 is 90011021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11937025 + 73984 = 3455^2 + 272^2 .

It is an emirp because it is prime and its reverse (90011021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12011009 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12010984 and 12011002.

It is not a weakly prime, because it can be changed into another prime (12011029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005504 + 6005505.

It is an arithmetic number, because the mean of its divisors is an integer number (6005505).

Almost surely, 2^12011009 is an apocalyptic number.

It is an amenable number.

12011009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011009 is an equidigital number, since it uses as much as digits as its factorization.

12011009 is an evil number, because the sum of its binary digits is even.

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

The square root of 12011009 is about 3465.6902631366. The cubic root of 12011009 is about 229.0128391065.

The spelling of 12011009 in words is "twelve million, eleven thousand, nine".