12565223222 has 8 divisors (see below), whose sum is σ = 19839826200. Its totient is φ = 5951947824.

The previous prime is 12565223207. The next prime is 12565223239. The reversal of 12565223222 is 22232256521.

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

It is a super-2 number, since 2×12565223222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165331847 + ... + 165331922.

It is an arithmetic number, because the mean of its divisors is an integer number (2479978275).

Almost surely, 2^12565223222 is an apocalyptic number.

12565223222 is a deficient number, since it is larger than the sum of its proper divisors (7274602978).

12565223222 is a wasteful number, since it uses less digits than its factorization.

12565223222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330663790.

The product of its digits is 28800, while the sum is 32.

Adding to 12565223222 its reverse (22232256521), we get a palindrome (34797479743).

The spelling of 12565223222 in words is "twelve billion, five hundred sixty-five million, two hundred twenty-three thousand, two hundred twenty-two".