2106171100 has 72 divisors (see below), whose sum is σ = 4993430400. Its totient is φ = 764721600.

The previous prime is 2106171083. The next prime is 2106171131. The reversal of 2106171100 is 11716012.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1119961 + ... + 1121839.

It is an arithmetic number, because the mean of its divisors is an integer number (69353200).

Almost surely, 2^2106171100 is an apocalyptic number.

2106171100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2106171100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2496715200).

2106171100 is an abundant number, since it is smaller than the sum of its proper divisors (2887259300).

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

2106171100 is a wasteful number, since it uses less digits than its factorization.

2106171100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923 (or 2916 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 2106171100 is about 45893.0397772908. The cubic root of 2106171100 is about 1281.8323163851.

Adding to 2106171100 its reverse (11716012), we get a palindrome (2117887112).

The spelling of 2106171100 in words is "two billion, one hundred six million, one hundred seventy-one thousand, one hundred".