Adding to 2100000000 its reverse (12), we get a palindrome (2100000012).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a nialpdrome in base 10.
It is a congruent number.
It is an unprimeable number.
Almost surely, 22100000000 is an apocalyptic number.
2100000000 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 2100000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3992185456).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2100000000 is an frugal number, since it uses more digits than its factorization.
2100000000 is an odious number, because the sum of its binary digits is odd.
The square root of 2100000000 is about 45825.7569495584. The cubic root of 2100000000 is about 1280.5791649875.
The spelling of 2100000000 in words is "two billion, one hundred million", and thus it is an aban number.