2100101209 has 8 divisors (see below), whose sum is σ = 2149598880. Its totient is φ = 2050633536.

The previous prime is 2100101191. The next prime is 2100101243. The reversal of 2100101209 is 9021010012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2100101209 - 2⁹ = 2100100697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100101192 and 2100101201.

It is not an unprimeable number, because it can be changed into a prime (2100101279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202062 + ... + 212200.

It is an arithmetic number, because the mean of its divisors is an integer number (268699860).

Almost surely, 2^2100101209 is an apocalyptic number.

It is an amenable number.

2100101209 is a deficient number, since it is larger than the sum of its proper divisors (49497671).

2100101209 is a wasteful number, since it uses less digits than its factorization.

2100101209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14999.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 2100101209 is about 45826.8612169762. The cubic root of 2100101209 is about 1280.5997370597.

The spelling of 2100101209 in words is "two billion, one hundred million, one hundred one thousand, two hundred nine".