12423001021 has 4 divisors (see below), whose sum is σ = 13076843200. Its totient is φ = 11769158844.

The previous prime is 12423000959. The next prime is 12423001049. The reversal of 12423001021 is 12010032421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12423001021 - 2¹⁹ = 12422476733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12423000986 and 12423001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423001061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326921061 + ... + 326921098.

It is an arithmetic number, because the mean of its divisors is an integer number (3269210800).

Almost surely, 2^12423001021 is an apocalyptic number.

It is an amenable number.

12423001021 is a deficient number, since it is larger than the sum of its proper divisors (653842179).

12423001021 is an equidigital number, since it uses as much as digits as its factorization.

12423001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653842178.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12423001021 its reverse (12010032421), we get a palindrome (24433033442).

The spelling of 12423001021 in words is "twelve billion, four hundred twenty-three million, one thousand, twenty-one".