1002000120009 has 24 divisors (see below), whose sum is σ = 1554220690848. Its totient is φ = 572535371520.

The previous prime is 1002000120001. The next prime is 1002000120041. The reversal of 1002000120009 is 9000210002001.

It is a happy number.

It is not a de Polignac number, because 1002000120009 - 2³ = 1002000120001 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1002000120009.

It is not an unprimeable number, because it can be changed into a prime (1002000120001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2215914 + ... + 2629500.

It is an arithmetic number, because the mean of its divisors is an integer number (64759195452).

Almost surely, 2^{1002000120009} is an apocalyptic number.

It is an amenable number.

1002000120009 is a deficient number, since it is larger than the sum of its proper divisors (552220570839).

1002000120009 is a wasteful number, since it uses less digits than its factorization.

1002000120009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430085 (or 430078 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The spelling of 1002000120009 in words is "one trillion, two billion, one hundred twenty thousand, nine".