1002002011009 has 2 divisors, whose sum is σ = 1002002011010. Its totient is φ = 1002002011008.

The previous prime is 1002002011001. The next prime is 1002002011019. The reversal of 1002002011009 is 9001102002001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 659917396609 + 342084614400 = 812353^2 + 584880^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002002011009 - 2³ = 1002002011001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002002010983 and 1002002011001.

It is not a weakly prime, because it can be changed into another prime (1002002011001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501001005504 + 501001005505.

It is an arithmetic number, because the mean of its divisors is an integer number (501001005505).

Almost surely, 2^{1002002011009} is an apocalyptic number.

It is an amenable number.

1002002011009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002002011009 is an equidigital number, since it uses as much as digits as its factorization.

1002002011009 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.

It can be divided in two parts, 100200 and 2011009, that added together give a square (2111209 = 1453²).

The spelling of 1002002011009 in words is "one trillion, two billion, two million, eleven thousand, nine".