12433021231 has 4 divisors (see below), whose sum is σ = 12834086464. Its totient is φ = 12031956000.

The previous prime is 12433021219. The next prime is 12433021273. The reversal of 12433021231 is 13212033421.

12433021231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13212033421 = 36877 ⋅358273.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12433021231 is a prime.

It is a super-2 number, since 2×12433021231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12433021291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200532570 + ... + 200532631.

It is an arithmetic number, because the mean of its divisors is an integer number (3208521616).

Almost surely, 2^12433021231 is an apocalyptic number.

12433021231 is a deficient number, since it is larger than the sum of its proper divisors (401065233).

12433021231 is an equidigital number, since it uses as much as digits as its factorization.

12433021231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401065232.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 12433021231 its reverse (13212033421), we get a palindrome (25645054652).

The spelling of 12433021231 in words is "twelve billion, four hundred thirty-three million, twenty-one thousand, two hundred thirty-one".