12223125665 has 8 divisors (see below), whose sum is σ = 14668384488. Its totient is φ = 9778078080.

The previous prime is 12223125659. The next prime is 12223125679. The reversal of 12223125665 is 56652132221.

It can be written as a sum of positive squares in 4 ways, for example, as 9141654544 + 3081471121 = 95612^2 + 55511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12223125665 - 2¹⁴ = 12223109281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135629 + ... + 206981.

It is an arithmetic number, because the mean of its divisors is an integer number (1833548061).

Almost surely, 2^12223125665 is an apocalyptic number.

It is an amenable number.

12223125665 is a deficient number, since it is larger than the sum of its proper divisors (2445258823).

12223125665 is an equidigital number, since it uses as much as digits as its factorization.

12223125665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105619.

The product of its digits is 43200, while the sum is 35.

Adding to 12223125665 its reverse (56652132221), we get a palindrome (68875257886).

The spelling of 12223125665 in words is "twelve billion, two hundred twenty-three million, one hundred twenty-five thousand, six hundred sixty-five".