12443011121 has 16 divisors (see below), whose sum is σ = 12955496400. Its totient is φ = 11936268288.

The previous prime is 12443011079. The next prime is 12443011199. The reversal of 12443011121 is 12111034421.

It can be written as a sum of positive squares in 8 ways, for example, as 2645970721 + 9797040400 = 51439^2 + 98980^2 .

It is a cyclic number.

It is not a de Polignac number, because 12443011121 - 2³⁰ = 11369269297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12443011093 and 12443011102.

It is not an unprimeable number, because it can be changed into a prime (12443011421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6586145 + ... + 6588033.

It is an arithmetic number, because the mean of its divisors is an integer number (809718525).

Almost surely, 2^12443011121 is an apocalyptic number.

It is an amenable number.

12443011121 is a deficient number, since it is larger than the sum of its proper divisors (512485279).

12443011121 is a wasteful number, since it uses less digits than its factorization.

12443011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3268.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 12443011121 its reverse (12111034421), we get a palindrome (24554045542).

The spelling of 12443011121 in words is "twelve billion, four hundred forty-three million, eleven thousand, one hundred twenty-one".