12222201220 has 24 divisors (see below), whose sum is σ = 25677520344. Its totient is φ = 4886804736.

The previous prime is 12222201203. The next prime is 12222201223. The reversal of 12222201220 is 2210222221.

It can be written as a sum of positive squares in 4 ways, for example, as 44195904 + 12178005316 = 6648^2 + 110354^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12222201194 and 12222201203.

It is not an unprimeable number, because it can be changed into a prime (12222201223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81007 + ... + 176086.

It is an arithmetic number, because the mean of its divisors is an integer number (1069896681).

Almost surely, 2^12222201220 is an apocalyptic number.

12222201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12222201220 is an abundant number, since it is smaller than the sum of its proper divisors (13455319124).

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

12222201220 is a wasteful number, since it uses less digits than its factorization.

12222201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259479 (or 259477 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12222201220 its reverse (2210222221), we get a palindrome (14432423441).

The spelling of 12222201220 in words is "twelve billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty".