12221322200220 has 144 divisors (see below), whose sum is σ = 39818581719840. Its totient is φ = 2792603713536.

The previous prime is 12221322200183. The next prime is 12221322200233. The reversal of 12221322200220 is 2200222312221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9162912 + ... + 10411608.

It is an arithmetic number, because the mean of its divisors is an integer number (276517928610).

Almost surely, 2^{12221322200220} is an apocalyptic number.

12221322200220 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 12221322200220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19909290859920).

12221322200220 is an abundant number, since it is smaller than the sum of its proper divisors (27597259519620).

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

12221322200220 is a wasteful number, since it uses less digits than its factorization.

12221322200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252052 (or 1252043 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 12221322200220 its reverse (2200222312221), we get a palindrome (14421544512441).

The spelling of 12221322200220 in words is "twelve trillion, two hundred twenty-one billion, three hundred twenty-two million, two hundred thousand, two hundred twenty".