1222221233220 has 192 divisors, whose sum is σ = 3903076751616. Its totient is φ = 283097825280.

The previous prime is 1222221233209. The next prime is 1222221233227. The reversal of 1222221233220 is 223321222221.

It is not an unprimeable number, because it can be changed into a prime (1222221233227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 114574327 + ... + 114584993.

It is an arithmetic number, because the mean of its divisors is an integer number (20328524748).

Almost surely, 2^{1222221233220} is an apocalyptic number.

1222221233220 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 1222221233220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1951538375808).

1222221233220 is an abundant number, since it is smaller than the sum of its proper divisors (2680855518396).

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

1222221233220 is a wasteful number, since it uses less digits than its factorization.

1222221233220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19350 (or 19348 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 1222221233220 its reverse (223321222221), we get a palindrome (1445542455441).

The spelling of 1222221233220 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred thirty-three thousand, two hundred twenty".