12211009 has 2 divisors, whose sum is σ = 12211010. Its totient is φ = 12211008.

The previous prime is 12210983. The next prime is 12211021. The reversal of 12211009 is 90011221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7049025 + 5161984 = 2655^2 + 2272^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211009 - 2⁷ = 12210881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12210983 and 12211001.

It is not a weakly prime, because it can be changed into another prime (12211079) 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, 6105504 + 6105505.

It is an arithmetic number, because the mean of its divisors is an integer number (6105505).

Almost surely, 2^12211009 is an apocalyptic number.

It is an amenable number.

12211009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211009 is an equidigital number, since it uses as much as digits as its factorization.

12211009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 12211009 is about 3494.4254177189. The cubic root of 12211009 is about 230.2769757091.

The spelling of 12211009 in words is "twelve million, two hundred eleven thousand, nine".