100011212 has 48 divisors (see below), whose sum is σ = 214583040. Its totient is φ = 39828672.

The previous prime is 100011203. The next prime is 100011217. The reversal of 100011212 is 212110001.

It is a self number, because there is not a number n which added to its sum of digits gives 100011212.

It is not an unprimeable number, because it can be changed into a prime (100011217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26423 + ... + 29969.

It is an arithmetic number, because the mean of its divisors is an integer number (4470480).

Almost surely, 2^100011212 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 100011212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107291520).

100011212 is an abundant number, since it is smaller than the sum of its proper divisors (114571828).

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

100011212 is a wasteful number, since it uses less digits than its factorization.

100011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630 (or 3628 counting only the distinct ones).

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

The square root of 100011212 is about 10000.5605842873. The cubic root of 100011212 is about 464.1762298777.

Adding to 100011212 its reverse (212110001), we get a palindrome (312121213).

The spelling of 100011212 in words is "one hundred million, eleven thousand, two hundred twelve".