12220516 has 36 divisors (see below), whose sum is σ = 26872384. Its totient is φ = 4759920.

The previous prime is 12220489. The next prime is 12220519. The reversal of 12220516 is 61502221.

12220516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12220516² = 298682022612512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12220493 and 12220502.

It is not an unprimeable number, because it can be changed into a prime (12220519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1585 + ... + 5191.

Almost surely, 2^12220516 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 12220516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13436192).

12220516 is an abundant number, since it is smaller than the sum of its proper divisors (14651868).

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

12220516 is a wasteful number, since it uses less digits than its factorization.

12220516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3640 (or 3627 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 12220516 is about 3495.7854625248. The cubic root of 12220516 is about 230.3367216673.

Adding to 12220516 its reverse (61502221), we get a palindrome (73722737).

It can be divided in two parts, 122205 and 16, that added together give a palindrome (122221).

The spelling of 12220516 in words is "twelve million, two hundred twenty thousand, five hundred sixteen".