12688300221 has 32 divisors (see below), whose sum is σ = 18349148160. Its totient is φ = 7777433664.

The previous prime is 12688300199. The next prime is 12688300231. The reversal of 12688300221 is 12200388621.

It is not a de Polignac number, because 12688300221 - 2⁹ = 12688299709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688300231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181960 + ... + 241838.

It is an arithmetic number, because the mean of its divisors is an integer number (573410880).

Almost surely, 2^12688300221 is an apocalyptic number.

It is an amenable number.

12688300221 is a deficient number, since it is larger than the sum of its proper divisors (5660847939).

12688300221 is a wasteful number, since it uses less digits than its factorization.

12688300221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60025.

The product of its (nonzero) digits is 9216, while the sum is 33.

Adding to 12688300221 its reverse (12200388621), we get a palindrome (24888688842).

The spelling of 12688300221 in words is "twelve billion, six hundred eighty-eight million, three hundred thousand, two hundred twenty-one".