11209212 has 48 divisors (see below), whose sum is σ = 33214720. Its totient is φ = 3202416.

The previous prime is 11209199. The next prime is 11209243. The reversal of 11209212 is 21290211.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6658 + ... + 8169.

Almost surely, 2^11209212 is an apocalyptic number.

11209212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11209212 is an abundant number, since it is smaller than the sum of its proper divisors (22005508).

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

11209212 is a wasteful number, since it uses less digits than its factorization.

11209212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14847 (or 14839 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 11209212 is about 3348.0161289934. The cubic root of 11209212 is about 223.7991130498.

Adding to 11209212 its reverse (21290211), we get a palindrome (32499423).

The spelling of 11209212 in words is "eleven million, two hundred nine thousand, two hundred twelve".