12221525320 has 32 divisors (see below), whose sum is σ = 27565702200. Its totient is φ = 4876651008.

The previous prime is 12221525293. The next prime is 12221525321. The reversal of 12221525320 is 2352512221.

12221525320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10362018436 + 1859506884 = 101794^2 + 43122^2 .

It is a super-2 number, since 2×12221525320² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12221525321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357159 + ... + 389878.

Almost surely, 2^12221525320 is an apocalyptic number.

12221525320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221525320 is an abundant number, since it is smaller than the sum of its proper divisors (15344176880).

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

12221525320 is a wasteful number, since it uses less digits than its factorization.

12221525320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747457 (or 747453 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 12221525320 in words is "twelve billion, two hundred twenty-one million, five hundred twenty-five thousand, three hundred twenty".