12220000 has 120 divisors (see below), whose sum is σ = 33064416. Its totient is φ = 4416000.

The previous prime is 12219997. The next prime is 12220003. The reversal of 12220000 is 2221.

It is a happy number.

12220000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12219997) and next prime (12220003).

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 259977 + ... + 260023.

Almost surely, 2^12220000 is an apocalyptic number.

12220000 is a gapful number since it is divisible by the number (10) 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 12220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16532208).

12220000 is an abundant number, since it is smaller than the sum of its proper divisors (20844416).

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

12220000 is an equidigital number, since it uses as much as digits as its factorization.

12220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 12220000 is about 3495.7116585897. The cubic root of 12220000 is about 230.3334797032. Note that the first 3 decimals are identical.

Adding to 12220000 its reverse (2221), we get a palindrome (12222221).

The spelling of 12220000 in words is "twelve million, two hundred twenty thousand".