12221302320 has 60 divisors (see below), whose sum is σ = 41043209376. Its totient is φ = 3259013760.

The previous prime is 12221302307. The next prime is 12221302321. The reversal of 12221302320 is 2320312221.

12221302320 is a `hidden beast` number, since 1 + 22 + 21 + 302 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

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 = 12221302293 and 12221302302.

It is not an unprimeable number, because it can be changed into a prime (12221302321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8486296 + ... + 8487735.

Almost surely, 2^12221302320 is an apocalyptic number.

12221302320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221302320 is an abundant number, since it is smaller than the sum of its proper divisors (28821907056).

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

12221302320 is a wasteful number, since it uses less digits than its factorization.

12221302320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16974050 (or 16974041 counting only the distinct ones).

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

Adding to 12221302320 its reverse (2320312221), we get a palindrome (14541614541).

Subtracting from 12221302320 its reverse (2320312221), we obtain a palindrome (9900990099).

The spelling of 12221302320 in words is "twelve billion, two hundred twenty-one million, three hundred two thousand, three hundred twenty".