12220356 has 24 divisors (see below), whose sum is σ = 28645120. Its totient is φ = 4054752.

The previous prime is 12220333. The next prime is 12220361. The reversal of 12220356 is 65302221.

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, 525 + ... + 4971.

Almost surely, 2^12220356 is an apocalyptic number.

It is an amenable number.

12220356 is an abundant number, since it is smaller than the sum of its proper divisors (16424764).

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

12220356 is a wasteful number, since it uses less digits than its factorization.

12220356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4683 (or 4681 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 12220356 is about 3495.7625777504. The cubic root of 12220356 is about 230.3357164169.

Adding to 12220356 its reverse (65302221), we get a palindrome (77522577).

The spelling of 12220356 in words is "twelve million, two hundred twenty thousand, three hundred fifty-six".