124203306421 has 2 divisors, whose sum is σ = 124203306422. Its totient is φ = 124203306420.

The previous prime is 124203306419. The next prime is 124203306449. The reversal of 124203306421 is 124603302421.

It is a happy number.

It is an a-pointer prime, because the next prime (124203306449) can be obtained adding 124203306421 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82892743921 + 41310562500 = 287911^2 + 203250^2 .

It is a cyclic number.

It is not a de Polignac number, because 124203306421 - 2¹ = 124203306419 is a prime.

It is a super-2 number, since 2×124203306421² (a number of 23 digits) contains 22 as substring.

Together with 124203306419, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 124203306421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124203306221) 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, 62101653210 + 62101653211.

It is an arithmetic number, because the mean of its divisors is an integer number (62101653211).

Almost surely, 2^124203306421 is an apocalyptic number.

It is an amenable number.

124203306421 is a deficient number, since it is larger than the sum of its proper divisors (1).

124203306421 is an equidigital number, since it uses as much as digits as its factorization.

124203306421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 124203306421 its reverse (124603302421), we get a palindrome (248806608842).

The spelling of 124203306421 in words is "one hundred twenty-four billion, two hundred three million, three hundred six thousand, four hundred twenty-one".