212101100 has 18 divisors (see below), whose sum is σ = 460259604. Its totient is φ = 84840400.

The previous prime is 212101079. The next prime is 212101103. The reversal of 212101100 is 1101212.

It is not an unprimeable number, because it can be changed into a prime (212101103) 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, 1060406 + ... + 1060605.

It is an arithmetic number, because the mean of its divisors is an integer number (25569978).

Almost surely, 2^212101100 is an apocalyptic number.

212101100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212101100 is an abundant number, since it is smaller than the sum of its proper divisors (248158504).

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

212101100 is a wasteful number, since it uses less digits than its factorization.

212101100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121025 (or 2121018 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 212101100 is about 14563.6911530010. The cubic root of 212101100 is about 596.3679656484.

Adding to 212101100 its reverse (1101212), we get a palindrome (213202312).

The spelling of 212101100 in words is "two hundred twelve million, one hundred one thousand, one hundred".