124243340113421 has 2 divisors, whose sum is σ = 124243340113422. Its totient is φ = 124243340113420.

The previous prime is 124243340113357. The next prime is 124243340113493. The reversal of 124243340113421 is 124311043342421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78037524193225 + 46205815920196 = 8833885^2 + 6797486^2 .

It is a cyclic number.

It is not a de Polignac number, because 124243340113421 - 2⁶ = 124243340113357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124243340413421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62121670056710 + 62121670056711.

It is an arithmetic number, because the mean of its divisors is an integer number (62121670056711).

Almost surely, 2^{124243340113421} is an apocalyptic number.

It is an amenable number.

124243340113421 is a deficient number, since it is larger than the sum of its proper divisors (1).

124243340113421 is an equidigital number, since it uses as much as digits as its factorization.

124243340113421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 124243340113421 its reverse (124311043342421), we get a palindrome (248554383455842).

The spelling of 124243340113421 in words is "one hundred twenty-four trillion, two hundred forty-three billion, three hundred forty million, one hundred thirteen thousand, four hundred twenty-one".