12430423021 has 2 divisors, whose sum is σ = 12430423022. Its totient is φ = 12430423020.

The previous prime is 12430423007. The next prime is 12430423037. The reversal of 12430423021 is 12032403421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12221302500 + 209120521 = 110550^2 + 14461^2 .

It is a cyclic number.

It is not a de Polignac number, because 12430423021 - 2²³ = 12422034413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12430422983 and 12430423001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12430429021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6215211510 + 6215211511.

It is an arithmetic number, because the mean of its divisors is an integer number (6215211511).

Almost surely, 2^12430423021 is an apocalyptic number.

It is an amenable number.

12430423021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12430423021 is an equidigital number, since it uses as much as digits as its factorization.

12430423021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 12430423021 its reverse (12032403421), we get a palindrome (24462826442).

The spelling of 12430423021 in words is "twelve billion, four hundred thirty million, four hundred twenty-three thousand, twenty-one".