12022221220 has 24 divisors (see below), whose sum is σ = 25833798144. Its totient is φ = 4697053536.

The previous prime is 12022221203. The next prime is 12022221241. The reversal of 12022221220 is 2212222021.

It is a junction number, because it is equal to n+sod(n) for n = 12022221194 and 12022221203.

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, 6988804 + ... + 6990523.

It is an arithmetic number, because the mean of its divisors is an integer number (1076408256).

Almost surely, 2^12022221220 is an apocalyptic number.

12022221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12022221220 is an abundant number, since it is smaller than the sum of its proper divisors (13811576924).

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

12022221220 is a wasteful number, since it uses less digits than its factorization.

12022221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13979379 (or 13979377 counting only the distinct ones).

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

Adding to 12022221220 its reverse (2212222021), we get a palindrome (14234443241).

The spelling of 12022221220 in words is "twelve billion, twenty-two million, two hundred twenty-one thousand, two hundred twenty".