12220221321220 has 24 divisors (see below), whose sum is σ = 27995416118208. Its totient is φ = 4443716844000.

The previous prime is 12220221321197. The next prime is 12220221321229. The reversal of 12220221321220 is 2212312202221.

It is a happy number.

12220221321220 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 (22).

It is a junction number, because it is equal to n+sod(n) for n = 12220221321191 and 12220221321200.

It is not an unprimeable number, because it can be changed into a prime (12220221321229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27773230056 + ... + 27773230495.

It is an arithmetic number, because the mean of its divisors is an integer number (1166475671592).

Almost surely, 2^{12220221321220} is an apocalyptic number.

12220221321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220221321220 is an abundant number, since it is smaller than the sum of its proper divisors (15775194796988).

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

12220221321220 is a wasteful number, since it uses less digits than its factorization.

12220221321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55546460571 (or 55546460569 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 12220221321220 its reverse (2212312202221), we get a palindrome (14432533523441).

The spelling of 12220221321220 in words is "twelve trillion, two hundred twenty billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred twenty".