2012122021009 has 2 divisors, whose sum is σ = 2012122021010. Its totient is φ = 2012122021008.

The previous prime is 2012122021001. The next prime is 2012122021067. The reversal of 2012122021009 is 9001202212102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1341519897600 + 670602123409 = 1158240^2 + 818903^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012122021009 - 2³ = 2012122021001 is a prime.

It is not a weakly prime, because it can be changed into another prime (2012122021001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006061010504 + 1006061010505.

It is an arithmetic number, because the mean of its divisors is an integer number (1006061010505).

Almost surely, 2^{2012122021009} is an apocalyptic number.

It is an amenable number.

2012122021009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012122021009 is an equidigital number, since it uses as much as digits as its factorization.

2012122021009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 2012122021009 in words is "two trillion, twelve billion, one hundred twenty-two million, twenty-one thousand, nine".