2109201100 has 18 divisors (see below), whose sum is σ = 4576966604. Its totient is φ = 843680400.

The previous prime is 2109201097. The next prime is 2109201103. The reversal of 2109201100 is 11029012.

It is an interprime number because it is at equal distance from previous prime (2109201097) and next prime (2109201103).

It is not an unprimeable number, because it can be changed into a prime (2109201103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10545906 + ... + 10546105.

Almost surely, 2^2109201100 is an apocalyptic number.

2109201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2109201100 is an abundant number, since it is smaller than the sum of its proper divisors (2467765504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2109201100 is a wasteful number, since it uses less digits than its factorization.

2109201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21092025 (or 21092018 counting only the distinct ones).

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

The square root of 2109201100 is about 45926.0394547581. The cubic root of 2109201100 is about 1282.4467158014.

The spelling of 2109201100 in words is "two billion, one hundred nine million, two hundred one thousand, one hundred".