12228545697 has 4 divisors (see below), whose sum is σ = 16304727600. Its totient is φ = 8152363796.

The previous prime is 12228545683. The next prime is 12228545699. The reversal of 12228545697 is 79654582221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79654582221 = 3 ⋅26551527407.

It is a cyclic number.

It is not a de Polignac number, because 12228545697 - 2¹⁸ = 12228283553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12228545699) 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, 2038090947 + ... + 2038090952.

It is an arithmetic number, because the mean of its divisors is an integer number (4076181900).

Almost surely, 2^12228545697 is an apocalyptic number.

It is an amenable number.

12228545697 is a deficient number, since it is larger than the sum of its proper divisors (4076181903).

12228545697 is an equidigital number, since it uses as much as digits as its factorization.

12228545697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4076181902.

The product of its digits is 2419200, while the sum is 51.

The spelling of 12228545697 in words is "twelve billion, two hundred twenty-eight million, five hundred forty-five thousand, six hundred ninety-seven".