124531143521 has 2 divisors, whose sum is σ = 124531143522. Its totient is φ = 124531143520.

The previous prime is 124531143487. The next prime is 124531143533. The reversal of 124531143521 is 125341135421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124160388496 + 370755025 = 352364^2 + 19255^2 .

It is an emirp because it is prime and its reverse (125341135421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124531143521 - 2²⁶ = 124464034657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (124531163521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62265571760 + 62265571761.

It is an arithmetic number, because the mean of its divisors is an integer number (62265571761).

Almost surely, 2^124531143521 is an apocalyptic number.

It is an amenable number.

124531143521 is a deficient number, since it is larger than the sum of its proper divisors (1).

124531143521 is an equidigital number, since it uses as much as digits as its factorization.

124531143521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

Adding to 124531143521 its reverse (125341135421), we get a palindrome (249872278942).

The spelling of 124531143521 in words is "one hundred twenty-four billion, five hundred thirty-one million, one hundred forty-three thousand, five hundred twenty-one".