124243124521 has 2 divisors, whose sum is σ = 124243124522. Its totient is φ = 124243124520.

The previous prime is 124243124449. The next prime is 124243124539. The reversal of 124243124521 is 125421342421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89940010000 + 34303114521 = 299900^2 + 185211^2 .

It is a cyclic number.

It is not a de Polignac number, because 124243124521 - 2⁹ = 124243124009 is a prime.

It is a super-2 number, since 2×124243124521² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (124243124821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62121562260 + 62121562261.

It is an arithmetic number, because the mean of its divisors is an integer number (62121562261).

Almost surely, 2^124243124521 is an apocalyptic number.

It is an amenable number.

124243124521 is a deficient number, since it is larger than the sum of its proper divisors (1).

124243124521 is an equidigital number, since it uses as much as digits as its factorization.

124243124521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 31.

Adding to 124243124521 its reverse (125421342421), we get a palindrome (249664466942).

The spelling of 124243124521 in words is "one hundred twenty-four billion, two hundred forty-three million, one hundred twenty-four thousand, five hundred twenty-one".