1222221232320 has 672 divisors, whose sum is σ = 4535176746240. Its totient is φ = 277871616000.

The previous prime is 1222221232279. The next prime is 1222221232321. The reversal of 1222221232320 is 232321222221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1222221232321) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 222908299 + ... + 222913781.

It is an arithmetic number, because the mean of its divisors is an integer number (6748774920).

Almost surely, 2^{1222221232320} is an apocalyptic number.

1222221232320 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 1222221232320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2267588373120).

1222221232320 is an abundant number, since it is smaller than the sum of its proper divisors (3312955513920).

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

1222221232320 is a wasteful number, since it uses less digits than its factorization.

1222221232320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5645 (or 5624 counting only the distinct ones).

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

Adding to 1222221232320 its reverse (232321222221), we get a palindrome (1454542454541).

It can be divided in two parts, 1222221 and 232320, that added together give a palindrome (1454541).

The spelling of 1222221232320 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred thirty-two thousand, three hundred twenty".