12823071121 has 15 divisors (see below), whose sum is σ = 14965835433. Its totient is φ = 10986447780.

The previous prime is 12823071089. The next prime is 12823071127. The reversal of 12823071121 is 12117032821.

The square root of 12823071121 is 113239.

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

It is not a de Polignac number, because 12823071121 - 2⁵ = 12823071089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12823071121.

It is not an unprimeable number, because it can be changed into a prime (12823071127) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 5547556 + ... + 5549866.

Almost surely, 2^12823071121 is an apocalyptic number.

12823071121 is the 113239-th square number.

12823071121 is the 56620-th centered octagonal number.

It is an amenable number.

12823071121 is a deficient number, since it is larger than the sum of its proper divisors (2142764312).

12823071121 is an frugal number, since it uses more digits than its factorization.

12823071121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4650 (or 2318 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The spelling of 12823071121 in words is "twelve billion, eight hundred twenty-three million, seventy-one thousand, one hundred twenty-one".