12221412 has 72 divisors (see below), whose sum is σ = 33948096. Its totient is φ = 3351936.

The previous prime is 12221401. The next prime is 12221413. The reversal of 12221412 is 21412221.

It is a super-2 number, since 2×12221412² = 298725822547488, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12221391 and 12221400.

It is not an unprimeable number, because it can be changed into a prime (12221413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70558 + ... + 70730.

Almost surely, 2^12221412 is an apocalyptic number.

12221412 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 12221412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16974048).

12221412 is an abundant number, since it is smaller than the sum of its proper divisors (21726684).

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

12221412 is a wasteful number, since it uses less digits than its factorization.

12221412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 214 counting only the distinct ones).

The product of its digits is 64, while the sum is 15.

The square root of 12221412 is about 3495.9136144934. The cubic root of 12221412 is about 230.3423509075.

Adding to 12221412 its reverse (21412221), we get a palindrome (33633633).

The spelling of 12221412 in words is "twelve million, two hundred twenty-one thousand, four hundred twelve".