11311212 has 24 divisors (see below), whose sum is σ = 28792512. Its totient is φ = 3427600.

The previous prime is 11311177. The next prime is 11311217. The reversal of 11311212 is 21211311.

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

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 not an unprimeable number, because it can be changed into a prime (11311217) by changing a digit.

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, 42714 + ... + 42977.

It is an arithmetic number, because the mean of its divisors is an integer number (1199688).

Almost surely, 2^11311212 is an apocalyptic number.

11311212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11311212 is an abundant number, since it is smaller than the sum of its proper divisors (17481300).

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

11311212 is a wasteful number, since it uses less digits than its factorization.

11311212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85709 (or 85707 counting only the distinct ones).

The product of its digits is 12, while the sum is 12.

The square root of 11311212 is about 3363.2145337460. The cubic root of 11311212 is about 224.4758961759.

Adding to 11311212 its reverse (21211311), we get a palindrome (32522523).

Subtracting 11311212 from its reverse (21211311), we obtain a palindrome (9900099).

It can be divided in two parts, 11311 and 212, that multiplied together give a palindrome (2397932).

The spelling of 11311212 in words is "eleven million, three hundred eleven thousand, two hundred twelve".