12012040009 has 2 divisors, whose sum is σ = 12012040010. Its totient is φ = 12012040008.

The previous prime is 12012039997. The next prime is 12012040021. The reversal of 12012040009 is 90004021021.

It is a balanced prime because it is at equal distance from previous prime (12012039997) and next prime (12012040021).

It can be written as a sum of positive squares in only one way, i.e., 10617241600 + 1394798409 = 103040^2 + 37347^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012040009 - 2⁷ = 12012039881 is a prime.

It is not a weakly prime, because it can be changed into another prime (12012040049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006020004 + 6006020005.

It is an arithmetic number, because the mean of its divisors is an integer number (6006020005).

Almost surely, 2^12012040009 is an apocalyptic number.

It is an amenable number.

12012040009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012040009 is an equidigital number, since it uses as much as digits as its factorization.

12012040009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

It can be divided in two parts, 1201 and 2040009, that added together give a triangular number (2041210 = T₂₀₂₀).

The spelling of 12012040009 in words is "twelve billion, twelve million, forty thousand, nine".