12220212220 has 12 divisors (see below), whose sum is σ = 25662445704. Its totient is φ = 4888084880.

The previous prime is 12220212217. The next prime is 12220212229. The reversal of 12220212220 is 2221202221.

It is a junction number, because it is equal to n+sod(n) for n = 12220212194 and 12220212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220212229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305505286 + ... + 305505325.

It is an arithmetic number, because the mean of its divisors is an integer number (2138537142).

Almost surely, 2^12220212220 is an apocalyptic number.

12220212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220212220 is an abundant number, since it is smaller than the sum of its proper divisors (13442233484).

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

12220212220 is a wasteful number, since it uses less digits than its factorization.

12220212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611010620 (or 611010618 counting only the distinct ones).

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

Adding to 12220212220 its reverse (2221202221), we get a palindrome (14441414441).

Subtracting from 12220212220 its reverse (2221202221), we obtain a palindrome (9999009999).

The spelling of 12220212220 in words is "twelve billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty".