12423442021 has 8 divisors (see below), whose sum is σ = 12727915200. Its totient is φ = 12119038560.

The previous prime is 12423442013. The next prime is 12423442027. The reversal of 12423442021 is 12024432421.

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

It is a cyclic number.

It is not a de Polignac number, because 12423442021 - 2³ = 12423442013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423442027) 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, 694690 + ... + 712348.

It is an arithmetic number, because the mean of its divisors is an integer number (1590989400).

Almost surely, 2^12423442021 is an apocalyptic number.

It is an amenable number.

12423442021 is a deficient number, since it is larger than the sum of its proper divisors (304473179).

12423442021 is a wasteful number, since it uses less digits than its factorization.

12423442021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34859.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 12423442021 its reverse (12024432421), we get a palindrome (24447874442).

The spelling of 12423442021 in words is "twelve billion, four hundred twenty-three million, four hundred forty-two thousand, twenty-one".