124241021 has 2 divisors, whose sum is σ = 124241022. Its totient is φ = 124241020.

The previous prime is 124241011. The next prime is 124241023. The reversal of 124241021 is 120142421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118504996 + 5736025 = 10886^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 124241021 - 2²⁶ = 57132157 is a prime.

It is a Sophie Germain prime.

Together with 124241023, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124241023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62120510 + 62120511.

It is an arithmetic number, because the mean of its divisors is an integer number (62120511).

Almost surely, 2^124241021 is an apocalyptic number.

It is an amenable number.

124241021 is a deficient number, since it is larger than the sum of its proper divisors (1).

124241021 is an equidigital number, since it uses as much as digits as its factorization.

124241021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 124241021 is about 11146.3456343324. The cubic root of 124241021 is about 498.9859728883.

Adding to 124241021 its reverse (120142421), we get a palindrome (244383442).

The spelling of 124241021 in words is "one hundred twenty-four million, two hundred forty-one thousand, twenty-one".