124123341521 has 2 divisors, whose sum is σ = 124123341522. Its totient is φ = 124123341520.

The previous prime is 124123341499. The next prime is 124123341523. The reversal of 124123341521 is 125143321421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74878849600 + 49244491921 = 273640^2 + 221911^2 .

It is a cyclic number.

It is not a de Polignac number, because 124123341521 - 2⁶ = 124123341457 is a prime.

Together with 124123341523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (124123341523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62061670760 + 62061670761.

It is an arithmetic number, because the mean of its divisors is an integer number (62061670761).

Almost surely, 2^124123341521 is an apocalyptic number.

It is an amenable number.

124123341521 is a deficient number, since it is larger than the sum of its proper divisors (1).

124123341521 is an equidigital number, since it uses as much as digits as its factorization.

124123341521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

Adding to 124123341521 its reverse (125143321421), we get a palindrome (249266662942).

The spelling of 124123341521 in words is "one hundred twenty-four billion, one hundred twenty-three million, three hundred forty-one thousand, five hundred twenty-one".