213100212 has 96 divisors (see below), whose sum is σ = 551779200. Its totient is φ = 63987456.

The previous prime is 213100201. The next prime is 213100243. The reversal of 213100212 is 212001312.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1555408 + ... + 1555544.

It is an arithmetic number, because the mean of its divisors is an integer number (5747700).

Almost surely, 2^213100212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213100212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275889600).

213100212 is an abundant number, since it is smaller than the sum of its proper divisors (338678988).

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

213100212 is a wasteful number, since it uses less digits than its factorization.

213100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 213100212 is about 14597.9523221581. The cubic root of 213100212 is about 597.3029054120.

Adding to 213100212 its reverse (212001312), we get a palindrome (425101524).

It can be divided in two parts, 213100 and 212, that added together give a palindrome (213312).

The spelling of 213100212 in words is "two hundred thirteen million, one hundred thousand, two hundred twelve".