213211100 has 36 divisors (see below), whose sum is σ = 469022064. Its totient is φ = 84113280.

The previous prime is 213211099. The next prime is 213211139. The reversal of 213211100 is 1112312.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7304 + ... + 21903.

Almost surely, 2^213211100 is an apocalyptic number.

213211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213211100 is an abundant number, since it is smaller than the sum of its proper divisors (255810964).

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

213211100 is a wasteful number, since it uses less digits than its factorization.

213211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29294 (or 29287 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 213211100 is about 14601.7498951324. The cubic root of 213211100 is about 597.4064908549.

Adding to 213211100 its reverse (1112312), we get a palindrome (214323412).

The spelling of 213211100 in words is "two hundred thirteen million, two hundred eleven thousand, one hundred".