1232221320 has 384 divisors, whose sum is σ = 4641960960. Its totient is φ = 280558080.

The previous prime is 1232221267. The next prime is 1232221349. The reversal of 1232221320 is 231222321.

1232221320 is a `hidden beast` number, since 1 + 2 + 322 + 21 + 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 = 1232221293 and 1232221302.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7559559 + ... + 7559721.

It is an arithmetic number, because the mean of its divisors is an integer number (12088440).

Almost surely, 2^1232221320 is an apocalyptic number.

1232221320 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 1232221320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2320980480).

1232221320 is an abundant number, since it is smaller than the sum of its proper divisors (3409739640).

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

1232221320 is a wasteful number, since it uses less digits than its factorization.

1232221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 290 counting only the distinct ones).

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

The square root of 1232221320 is about 35103.0101273381. The cubic root of 1232221320 is about 1072.0858720288.

Adding to 1232221320 its reverse (231222321), we get a palindrome (1463443641).

The spelling of 1232221320 in words is "one billion, two hundred thirty-two million, two hundred twenty-one thousand, three hundred twenty".