12220221001220 has 96 divisors (see below), whose sum is σ = 27098660198400. Its totient is φ = 4616169554304.

The previous prime is 12220221001217. The next prime is 12220221001231. The reversal of 12220221001220 is 2210012202221.

It is a happy 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 31 ways as a sum of consecutive naturals, for example, 286146389 + ... + 286189091.

It is an arithmetic number, because the mean of its divisors is an integer number (282277710400).

Almost surely, 2^{12220221001220} is an apocalyptic number.

12220221001220 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 12220221001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13549330099200).

12220221001220 is an abundant number, since it is smaller than the sum of its proper divisors (14878439197180).

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

12220221001220 is a wasteful number, since it uses less digits than its factorization.

12220221001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45097 (or 45095 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12220221001220 its reverse (2210012202221), we get a palindrome (14430233203441).

The spelling of 12220221001220 in words is "twelve trillion, two hundred twenty billion, two hundred twenty-one million, one thousand, two hundred twenty".