124203142321 has 2 divisors, whose sum is σ = 124203142322. Its totient is φ = 124203142320.

The previous prime is 124203142319. The next prime is 124203142361. The reversal of 124203142321 is 123241302421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86397784225 + 37805358096 = 293935^2 + 194436^2 .

It is a cyclic number.

It is not a de Polignac number, because 124203142321 - 2¹ = 124203142319 is a prime.

Together with 124203142319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (124203142361) 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, 62101571160 + 62101571161.

It is an arithmetic number, because the mean of its divisors is an integer number (62101571161).

Almost surely, 2^124203142321 is an apocalyptic number.

It is an amenable number.

124203142321 is a deficient number, since it is larger than the sum of its proper divisors (1).

124203142321 is an equidigital number, since it uses as much as digits as its factorization.

124203142321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 124203142321 its reverse (123241302421), we get a palindrome (247444444742).

The spelling of 124203142321 in words is "one hundred twenty-four billion, two hundred three million, one hundred forty-two thousand, three hundred twenty-one".