210100000009 has 4 divisors (see below), whose sum is σ = 212759493760. Its totient is φ = 207440506260.

The previous prime is 210100000001. The next prime is 210100000031. The reversal of 210100000009 is 900000001012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210100000009 - 2³ = 210100000001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210100000001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1329746757 + ... + 1329746914.

It is an arithmetic number, because the mean of its divisors is an integer number (53189873440).

Almost surely, 2^210100000009 is an apocalyptic number.

It is an amenable number.

210100000009 is a deficient number, since it is larger than the sum of its proper divisors (2659493751).

210100000009 is an equidigital number, since it uses as much as digits as its factorization.

210100000009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659493750.

The product of its (nonzero) digits is 18, while the sum is 13.

The spelling of 210100000009 in words is "two hundred ten billion, one hundred million, nine", and thus it is an aban number.