11220312 has 32 divisors (see below), whose sum is σ = 28583280. Its totient is φ = 3669120.

The previous prime is 11220311. The next prime is 11220331. The reversal of 11220312 is 21302211.

11220312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3139 + ... + 5682.

Almost surely, 2^11220312 is an apocalyptic number.

11220312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11220312 is an abundant number, since it is smaller than the sum of its proper divisors (17362968).

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

11220312 is a wasteful number, since it uses less digits than its factorization.

11220312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8883 (or 8879 counting only the distinct ones).

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

The square root of 11220312 is about 3349.6734169169. The cubic root of 11220312 is about 223.8729615540.

Adding to 11220312 its reverse (21302211), we get a palindrome (32522523).

The spelling of 11220312 in words is "eleven million, two hundred twenty thousand, three hundred twelve".