2102721168 has 20 divisors (see below), whose sum is σ = 5432029808. Its totient is φ = 700907040.

The previous prime is 2102721151. The next prime is 2102721169. The reversal of 2102721168 is 8611272012.

It is not an unprimeable number, because it can be changed into a prime (2102721169) 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 3 ways as a sum of consecutive naturals, for example, 21903298 + ... + 21903393.

Almost surely, 2^2102721168 is an apocalyptic number.

It is an amenable number.

2102721168 is an abundant number, since it is smaller than the sum of its proper divisors (3329308640).

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

2102721168 is a wasteful number, since it uses less digits than its factorization.

2102721168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43806702 (or 43806696 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 2102721168 is about 45855.4377146266. The cubic root of 2102721168 is about 1281.1320486365.

It can be divided in two parts, 21027 and 21168, that added together give a triangular number (42195 = T₂₉₀).

The spelling of 2102721168 in words is "two billion, one hundred two million, seven hundred twenty-one thousand, one hundred sixty-eight".