12013222221220 has 144 divisors (see below), whose sum is σ = 29388417408000. Its totient is φ = 4089946931200.

The previous prime is 12013222221163. The next prime is 12013222221257. The reversal of 12013222221220 is 2212222231021.

It is a happy number.

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 = 12013222221191 and 12013222221200.

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, 11649156 + ... + 12638404.

It is an arithmetic number, because the mean of its divisors is an integer number (204086232000).

Almost surely, 2^{12013222221220} is an apocalyptic number.

12013222221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12013222221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14694208704000).

12013222221220 is an abundant number, since it is smaller than the sum of its proper divisors (17375195186780).

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

12013222221220 is a wasteful number, since it uses less digits than its factorization.

12013222221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989494 (or 989475 counting only the distinct ones).

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

Adding to 12013222221220 its reverse (2212222231021), we get a palindrome (14225444452241).

The spelling of 12013222221220 in words is "twelve trillion, thirteen billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty".