12010001209 has 2 divisors, whose sum is σ = 12010001210. Its totient is φ = 12010001208.

The previous prime is 12010001191. The next prime is 12010001221. The reversal of 12010001209 is 90210001021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11968360000 + 41641209 = 109400^2 + 6453^2 .

It is a cyclic number.

It is not a de Polignac number, because 12010001209 - 2⁵ = 12010001177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12010001192 and 12010001201.

It is not a weakly prime, because it can be changed into another prime (12010001279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005000604 + 6005000605.

It is an arithmetic number, because the mean of its divisors is an integer number (6005000605).

Almost surely, 2^12010001209 is an apocalyptic number.

It is an amenable number.

12010001209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12010001209 is an equidigital number, since it uses as much as digits as its factorization.

12010001209 is an evil number, because the sum of its binary digits is even.

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

The spelling of 12010001209 in words is "twelve billion, ten million, one thousand, two hundred nine".