12443232021 has 8 divisors (see below), whose sum is σ = 18099246624. Its totient is φ = 7541352720.

The previous prime is 12443231989. The next prime is 12443232023. The reversal of 12443232021 is 12023234421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12443232021 - 2⁵ = 12443231989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12443231982 and 12443232000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12443232023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188533786 + ... + 188533851.

It is an arithmetic number, because the mean of its divisors is an integer number (2262405828).

Almost surely, 2^12443232021 is an apocalyptic number.

12443232021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12443232021 is a deficient number, since it is larger than the sum of its proper divisors (5656014603).

12443232021 is a wasteful number, since it uses less digits than its factorization.

12443232021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377067651.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 12443232021 its reverse (12023234421), we get a palindrome (24466466442).

The spelling of 12443232021 in words is "twelve billion, four hundred forty-three million, two hundred thirty-two thousand, twenty-one".