12221000220 has 96 divisors (see below), whose sum is σ = 40201136640. Its totient is φ = 2734767360.

The previous prime is 12221000219. The next prime is 12221000291. The reversal of 12221000220 is 2200012221.

12221000220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12221000196 and 12221000205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 703600 + ... + 720759.

It is an arithmetic number, because the mean of its divisors is an integer number (418761840).

Almost surely, 2^12221000220 is an apocalyptic number.

12221000220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221000220 is an abundant number, since it is smaller than the sum of its proper divisors (27980136420).

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

12221000220 is a wasteful number, since it uses less digits than its factorization.

12221000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424395 (or 1424393 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 12221000220 its reverse (2200012221), we get a palindrome (14421012441).

The spelling of 12221000220 in words is "twelve billion, two hundred twenty-one million, two hundred twenty", and thus it is an aban number.