2100500109 has 12 divisors (see below), whose sum is σ = 3047664256. Its totient is φ = 1394052552.

The previous prime is 2100500107. The next prime is 2100500159. The reversal of 2100500109 is 9010050012.

It is not a de Polignac number, because 2100500109 - 2¹ = 2100500107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100500091 and 2100500100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100500107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 521287 + ... + 525300.

Almost surely, 2^2100500109 is an apocalyptic number.

It is an amenable number.

2100500109 is a deficient number, since it is larger than the sum of its proper divisors (947164147).

2100500109 is a wasteful number, since it uses less digits than its factorization.

2100500109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046816 (or 1046813 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 2100500109 is about 45831.2132612699. The cubic root of 2100500109 is about 1280.6808123420.

The spelling of 2100500109 in words is "two billion, one hundred million, five hundred thousand, one hundred nine".