12433344021 has 32 divisors (see below), whose sum is σ = 21096391680. Its totient is φ = 7089504048.

The previous prime is 12433343977. The next prime is 12433344023. The reversal of 12433344021 is 12044333421.

It is not a de Polignac number, because 12433344021 - 2¹³ = 12433335829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12433344023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17830 + ... + 158696.

It is an arithmetic number, because the mean of its divisors is an integer number (659262240).

Almost surely, 2^12433344021 is an apocalyptic number.

It is an amenable number.

12433344021 is a deficient number, since it is larger than the sum of its proper divisors (8663047659).

12433344021 is a wasteful number, since it uses less digits than its factorization.

12433344021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141350 (or 141344 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 12433344021 its reverse (12044333421), we get a palindrome (24477677442).

The spelling of 12433344021 in words is "twelve billion, four hundred thirty-three million, three hundred forty-four thousand, twenty-one".