12433242421 has 2 divisors, whose sum is σ = 12433242422. Its totient is φ = 12433242420.

The previous prime is 12433242391. The next prime is 12433242433. The reversal of 12433242421 is 12424233421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11345232196 + 1088010225 = 106514^2 + 32985^2 .

It is a cyclic number.

It is not a de Polignac number, because 12433242421 - 2¹⁷ = 12433111349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12433242421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12433245421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6216621210 + 6216621211.

It is an arithmetic number, because the mean of its divisors is an integer number (6216621211).

Almost surely, 2^12433242421 is an apocalyptic number.

It is an amenable number.

12433242421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12433242421 is an equidigital number, since it uses as much as digits as its factorization.

12433242421 is an evil number, because the sum of its binary digits is even.

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

Adding to 12433242421 its reverse (12424233421), we get a palindrome (24857475842).

It can be divided in two parts, 124332 and 42421, that added together give a triangular number (166753 = T₅₇₇).

The spelling of 12433242421 in words is "twelve billion, four hundred thirty-three million, two hundred forty-two thousand, four hundred twenty-one".