12220912 has 40 divisors (see below), whose sum is σ = 26962560. Its totient is φ = 5311680.

The previous prime is 12220903. The next prime is 12220921. The reversal of 12220912 is 21902221.

It is an interprime number because it is at equal distance from previous prime (12220903) and next prime (12220921).

It is a super-2 number, since 2×12220912² = 298701380223488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12220912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2539 + ... + 5557.

It is an arithmetic number, because the mean of its divisors is an integer number (674064).

Almost surely, 2^12220912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12220912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13481280).

12220912 is an abundant number, since it is smaller than the sum of its proper divisors (14741648).

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

12220912 is a wasteful number, since it uses less digits than its factorization.

12220912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061 (or 3055 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 12220912 is about 3495.8421016974. The cubic root of 12220912 is about 230.3392096243.

It can be divided in two parts, 122209 and 12, that added together give a palindrome (122221).

The spelling of 12220912 in words is "twelve million, two hundred twenty thousand, nine hundred twelve".