2102127209 has 16 divisors (see below), whose sum is σ = 2588328960. Its totient is φ = 1662517440.

The previous prime is 2102127173. The next prime is 2102127227. The reversal of 2102127209 is 9027212012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102127209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2102123209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360104 + ... + 365894.

It is an arithmetic number, because the mean of its divisors is an integer number (161770560).

Almost surely, 2^2102127209 is an apocalyptic number.

It is an amenable number.

2102127209 is a deficient number, since it is larger than the sum of its proper divisors (486201751).

2102127209 is a wasteful number, since it uses less digits than its factorization.

2102127209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9800.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 2102127209 is about 45848.9608279184. The cubic root of 2102127209 is about 1281.0114094728.

The spelling of 2102127209 in words is "two billion, one hundred two million, one hundred twenty-seven thousand, two hundred nine".