123312333421 has 2 divisors, whose sum is σ = 123312333422. Its totient is φ = 123312333420.

The previous prime is 123312333359. The next prime is 123312333437. The reversal of 123312333421 is 124333213321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76652013321 + 46660320100 = 276861^2 + 216010^2 .

It is a cyclic number.

It is not a de Polignac number, because 123312333421 - 2¹³ = 123312325229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123312333421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123312333721) 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 as a sum of consecutive naturals, namely, 61656166710 + 61656166711.

It is an arithmetic number, because the mean of its divisors is an integer number (61656166711).

Almost surely, 2^123312333421 is an apocalyptic number.

It is an amenable number.

123312333421 is a deficient number, since it is larger than the sum of its proper divisors (1).

123312333421 is an equidigital number, since it uses as much as digits as its factorization.

123312333421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 28.

Adding to 123312333421 its reverse (124333213321), we get a palindrome (247645546742).

The spelling of 123312333421 in words is "one hundred twenty-three billion, three hundred twelve million, three hundred thirty-three thousand, four hundred twenty-one".