11111212 has 24 divisors (see below), whose sum is σ = 22448160. Its totient is φ = 4713600.

The previous prime is 11111209. The next prime is 11111267. The reversal of 11111212 is 21211111.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864 + ... + 4792.

It is an arithmetic number, because the mean of its divisors is an integer number (935340).

Almost surely, 2^11111212 is an apocalyptic number.

It is an amenable number.

11111212 is an abundant number, since it is smaller than the sum of its proper divisors (11336948).

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

11111212 is a wasteful number, since it uses less digits than its factorization.

11111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041 (or 4039 counting only the distinct ones).

The product of its digits is 4, while the sum is 10.

The square root of 11111212 is about 3333.3484666323. The cubic root of 11111212 is about 223.1449920755.

Adding to 11111212 its reverse (21211111), we get a palindrome (32322323).

It can be divided in two parts, 11111 and 212, that multiplied together give a palindrome (2355532).

The spelling of 11111212 in words is "eleven million, one hundred eleven thousand, two hundred twelve".