12121302220 has 24 divisors (see below), whose sum is σ = 26561463264. Its totient is φ = 4637715456.

The previous prime is 12121302211. The next prime is 12121302227. The reversal of 12121302220 is 2220312121.

It is a happy number.

12121302220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12121302194 and 12121302203.

It is not an unprimeable number, because it can be changed into a prime (12121302227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13174869 + ... + 13175788.

It is an arithmetic number, because the mean of its divisors is an integer number (1106727636).

Almost surely, 2^12121302220 is an apocalyptic number.

12121302220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121302220 is an abundant number, since it is smaller than the sum of its proper divisors (14440161044).

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

12121302220 is a wasteful number, since it uses less digits than its factorization.

12121302220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26350689 (or 26350687 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12121302220 its reverse (2220312121), we get a palindrome (14341614341).

Subtracting from 12121302220 its reverse (2220312121), we obtain a palindrome (9900990099).

The spelling of 12121302220 in words is "twelve billion, one hundred twenty-one million, three hundred two thousand, two hundred twenty".