12225173689 has 4 divisors (see below), whose sum is σ = 12225717220. Its totient is φ = 12224630160.

The previous prime is 12225173687. The next prime is 12225173749. The reversal of 12225173689 is 98637152221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98637152221 = 87427 ⋅1128223.

It can be written as a sum of positive squares in 2 ways, for example, as 5806440000 + 6418733689 = 76200^2 + 80117^2 .

It is a cyclic number.

It is not a de Polignac number, because 12225173689 - 2¹ = 12225173687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12225173683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236502 + ... + 283519.

It is an arithmetic number, because the mean of its divisors is an integer number (3056429305).

Almost surely, 2^12225173689 is an apocalyptic number.

It is an amenable number.

12225173689 is a deficient number, since it is larger than the sum of its proper divisors (543531).

12225173689 is an equidigital number, since it uses as much as digits as its factorization.

12225173689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543530.

The product of its digits is 362880, while the sum is 46.

The spelling of 12225173689 in words is "twelve billion, two hundred twenty-five million, one hundred seventy-three thousand, six hundred eighty-nine".