12226388329 has 3 divisors (see below), whose sum is σ = 12226498903. Its totient is φ = 12226277756.

The previous prime is 12226388303. The next prime is 12226388347. The reversal of 12226388329 is 92388362221.

It is a happy number.

The square root of 12226388329 is 110573.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92388362221 = 182167 ⋅507163.

It can be written as a sum of positive squares in only one way, i.e., 9369272025 + 2857116304 = 96795^2 + 53452^2 .

It is not a de Polignac number, because 12226388329 - 2¹³ = 12226380137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12226388029) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 55287 + ... + 165859.

Almost surely, 2^12226388329 is an apocalyptic number.

12226388329 is the 110573-rd square number.

12226388329 is the 55287-th centered octagonal number.

It is an amenable number.

12226388329 is a deficient number, since it is larger than the sum of its proper divisors (110574).

12226388329 is an frugal number, since it uses more digits than its factorization.

12226388329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221146 (or 110573 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The spelling of 12226388329 in words is "twelve billion, two hundred twenty-six million, three hundred eighty-eight thousand, three hundred twenty-nine".