2012523021209 has 2 divisors, whose sum is σ = 2012523021210. Its totient is φ = 2012523021208.

The previous prime is 2012523021191. The next prime is 2012523021283. The reversal of 2012523021209 is 9021203252102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1640602339600 + 371920681609 = 1280860^2 + 609853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2012523021209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2012523026209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006261510604 + 1006261510605.

It is an arithmetic number, because the mean of its divisors is an integer number (1006261510605).

Almost surely, 2^{2012523021209} is an apocalyptic number.

It is an amenable number.

2012523021209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012523021209 is an equidigital number, since it uses as much as digits as its factorization.

2012523021209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 2012523021209 in words is "two trillion, twelve billion, five hundred twenty-three million, twenty-one thousand, two hundred nine".