12221120012220 has 144 divisors (see below), whose sum is σ = 42370047265728. Its totient is φ = 2793168230400.

The previous prime is 12221120012183. The next prime is 12221120012251. The reversal of 12221120012220 is 2221002112221.

It is a happy number.

12221120012220 is a `hidden beast` number, since 1 + 22 + 211 + 200 + 12 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12221120012193 and 12221120012202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15105012 + ... + 15893508.

Almost surely, 2^{12221120012220} is an apocalyptic number.

12221120012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221120012220 is an abundant number, since it is smaller than the sum of its proper divisors (30148927253508).

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

12221120012220 is a wasteful number, since it uses less digits than its factorization.

12221120012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800820 (or 800815 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12221120012220 its reverse (2221002112221), we get a palindrome (14442122124441).

The spelling of 12221120012220 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty million, twelve thousand, two hundred twenty".