12433213421 has 2 divisors, whose sum is σ = 12433213422. Its totient is φ = 12433213420.

The previous prime is 12433213417. The next prime is 12433213427. The reversal of 12433213421 is 12431233421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9699492196 + 2733721225 = 98486^2 + 52285^2 .

It is a cyclic number.

It is not a de Polignac number, because 12433213421 - 2² = 12433213417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12433213427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6216606710 + 6216606711.

It is an arithmetic number, because the mean of its divisors is an integer number (6216606711).

Almost surely, 2^12433213421 is an apocalyptic number.

It is an amenable number.

12433213421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12433213421 is an equidigital number, since it uses as much as digits as its factorization.

12433213421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 26.

Adding to 12433213421 its reverse (12431233421), we get a palindrome (24864446842).

The spelling of 12433213421 in words is "twelve billion, four hundred thirty-three million, two hundred thirteen thousand, four hundred twenty-one".