1000120002009 has 64 divisors (see below), whose sum is σ = 1413749514240. Its totient is φ = 627955211520.

The previous prime is 1000120001989. The next prime is 1000120002023. The reversal of 1000120002009 is 9002000210001.

It is a happy number.

It is not a de Polignac number, because 1000120002009 - 2⁹ = 1000120001497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1000120002029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 484788112 + ... + 484790174.

It is an arithmetic number, because the mean of its divisors is an integer number (22089836160).

Almost surely, 2^{1000120002009} is an apocalyptic number.

It is an amenable number.

1000120002009 is a deficient number, since it is larger than the sum of its proper divisors (413629512231).

1000120002009 is a wasteful number, since it uses less digits than its factorization.

1000120002009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870.

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

The spelling of 1000120002009 in words is "one trillion, one hundred twenty million, two thousand, nine".