11212812 has 108 divisors (see below), whose sum is σ = 32639880. Its totient is φ = 3234816.

The previous prime is 11212787. The next prime is 11212823. The reversal of 11212812 is 21821211.

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 115548 + ... + 115644.

Almost surely, 2^11212812 is an apocalyptic number.

11212812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11212812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16319940).

11212812 is an abundant number, since it is smaller than the sum of its proper divisors (21427068).

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

11212812 is a wasteful number, since it uses less digits than its factorization.

11212812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 134 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

The square root of 11212812 is about 3348.5537176518. The cubic root of 11212812 is about 223.8230692557.

The spelling of 11212812 in words is "eleven million, two hundred twelve thousand, eight hundred twelve".