12022812 has 36 divisors (see below), whose sum is σ = 30511936. Its totient is φ = 3991680.

The previous prime is 12022811. The next prime is 12022819. The reversal of 12022812 is 21822021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12022811) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 11637 + ... + 12627.

Almost surely, 2^12022812 is an apocalyptic number.

12022812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12022812 is an abundant number, since it is smaller than the sum of its proper divisors (18489124).

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

12022812 is a wasteful number, since it uses less digits than its factorization.

12022812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338 (or 1333 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 12022812 is about 3467.3926803868. The cubic root of 12022812 is about 229.0878301311.

Adding to 12022812 its reverse (21822021), we get a palindrome (33844833).

The spelling of 12022812 in words is "twelve million, twenty-two thousand, eight hundred twelve".