12212244221220 has 144 divisors (see below), whose sum is σ = 37251975720960. Its totient is φ = 3238310995200.

The previous prime is 12212244221189. The next prime is 12212244221237. The reversal of 12212244221220 is 2212244221221.

12212244221220 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 2 + 2 + 442 + 212 + 2 + 0 = 666.

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, 91762486 + ... + 91895474.

It is an arithmetic number, because the mean of its divisors is an integer number (258694275840).

Almost surely, 2^{12212244221220} is an apocalyptic number.

12212244221220 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 12212244221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18625987860480).

12212244221220 is an abundant number, since it is smaller than the sum of its proper divisors (25039731499740).

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

12212244221220 is a wasteful number, since it uses less digits than its factorization.

12212244221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135866 (or 135861 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

Adding to 12212244221220 its reverse (2212244221221), we get a palindrome (14424488442441).

Subtracting from 12212244221220 its reverse (2212244221221), we obtain a palindrome (9999999999999).

The spelling of 12212244221220 in words is "twelve trillion, two hundred twelve billion, two hundred forty-four million, two hundred twenty-one thousand, two hundred twenty".