212170100 has 36 divisors (see below), whose sum is σ = 463491168. Its totient is φ = 84300000.

The previous prime is 212170073. The next prime is 212170129. The reversal of 212170100 is 1071212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8075 + ... + 22125.

Almost surely, 2^212170100 is an apocalyptic number.

212170100 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 212170100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231745584).

212170100 is an abundant number, since it is smaller than the sum of its proper divisors (251321068).

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

212170100 is a wasteful number, since it uses less digits than its factorization.

212170100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14216 (or 14209 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 212170100 is about 14566.0598653170. The cubic root of 212170100 is about 596.4326280951.

The spelling of 212170100 in words is "two hundred twelve million, one hundred seventy thousand, one hundred".