12432441021 has 64 divisors (see below), whose sum is σ = 22336849920. Its totient is φ = 5940138240.

The previous prime is 12432440989. The next prime is 12432441023. The reversal of 12432441021 is 12014423421.

It is not a de Polignac number, because 12432441021 - 2⁵ = 12432440989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12432440982 and 12432441000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12432441023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 842535 + ... + 857163.

It is an arithmetic number, because the mean of its divisors is an integer number (349013280).

Almost surely, 2^12432441021 is an apocalyptic number.

12432441021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12432441021 is a deficient number, since it is larger than the sum of its proper divisors (9904408899).

12432441021 is a wasteful number, since it uses less digits than its factorization.

12432441021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14946.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 12432441021 its reverse (12014423421), we get a palindrome (24446864442).

The spelling of 12432441021 in words is "twelve billion, four hundred thirty-two million, four hundred forty-one thousand, twenty-one".