12443211031 has 4 divisors (see below), whose sum is σ = 12443762592. Its totient is φ = 12442659472.

The previous prime is 12443211007. The next prime is 12443211049. The reversal of 12443211031 is 13011234421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12443211031 - 2¹¹ = 12443208983 is a prime.

It is a super-2 number, since 2×12443211031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12443210993 and 12443211011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12443211631) 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, 240430 + ... + 287563.

It is an arithmetic number, because the mean of its divisors is an integer number (3110940648).

Almost surely, 2^12443211031 is an apocalyptic number.

12443211031 is a deficient number, since it is larger than the sum of its proper divisors (551561).

12443211031 is an equidigital number, since it uses as much as digits as its factorization.

12443211031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551560.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 12443211031 its reverse (13011234421), we get a palindrome (25454445452).

The spelling of 12443211031 in words is "twelve billion, four hundred forty-three million, two hundred eleven thousand, thirty-one".