212201100 has 72 divisors (see below), whose sum is σ = 682195920. Its totient is φ = 56586240.

The previous prime is 212201071. The next prime is 212201137. The reversal of 212201100 is 1102212.

212201100 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

212201100 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36597 + ... + 41996.

Almost surely, 2^212201100 is an apocalyptic number.

212201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212201100 is an abundant number, since it is smaller than the sum of its proper divisors (469994820).

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

212201100 is a wasteful number, since it uses less digits than its factorization.

212201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78616 (or 78603 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 212201100 is about 14567.1239440049. The cubic root of 212201100 is about 596.4616747752.

Adding to 212201100 its reverse (1102212), we get a palindrome (213303312).

The spelling of 212201100 in words is "two hundred twelve million, two hundred one thousand, one hundred".