1222321320 has 256 divisors, whose sum is σ = 4589568000. Its totient is φ = 286675200.

The previous prime is 1222321297. The next prime is 1222321337. The reversal of 1222321320 is 231232221.

1222321320 is a `hidden beast` number, since 1 + 2 + 22 + 321 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1222321293 and 1222321302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 366621 + ... + 369939.

It is an arithmetic number, because the mean of its divisors is an integer number (17928000).

Almost surely, 2^1222321320 is an apocalyptic number.

1222321320 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 1222321320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2294784000).

1222321320 is an abundant number, since it is smaller than the sum of its proper divisors (3367246680).

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

1222321320 is a wasteful number, since it uses less digits than its factorization.

1222321320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3381 (or 3371 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1222321320 is about 34961.7122006346. The cubic root of 1222321320 is about 1069.2070055381.

Adding to 1222321320 its reverse (231232221), we get a palindrome (1453553541).

The spelling of 1222321320 in words is "one billion, two hundred twenty-two million, three hundred twenty-one thousand, three hundred twenty".