13242423421 has 2 divisors, whose sum is σ = 13242423422. Its totient is φ = 13242423420.

The previous prime is 13242423391. The next prime is 13242423431. The reversal of 13242423421 is 12432424231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12512883321 + 729540100 = 111861^2 + 27010^2 .

It is a cyclic number.

It is not a de Polignac number, because 13242423421 - 2⁹ = 13242422909 is a prime.

It is a super-2 number, since 2×13242423421² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13242423421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13242423431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6621211710 + 6621211711.

It is an arithmetic number, because the mean of its divisors is an integer number (6621211711).

Almost surely, 2^13242423421 is an apocalyptic number.

It is an amenable number.

13242423421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13242423421 is an equidigital number, since it uses as much as digits as its factorization.

13242423421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 28.

Adding to 13242423421 its reverse (12432424231), we get a palindrome (25674847652).

The spelling of 13242423421 in words is "thirteen billion, two hundred forty-two million, four hundred twenty-three thousand, four hundred twenty-one".