124163021 has 2 divisors, whose sum is σ = 124163022. Its totient is φ = 124163020.

The previous prime is 124163003. The next prime is 124163023. The reversal of 124163021 is 120361421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105801796 + 18361225 = 10286^2 + 4285^2 .

It is an emirp because it is prime and its reverse (120361421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124163021 - 2¹⁰ = 124161997 is a prime.

Together with 124163023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 124162984 and 124163002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124163023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62081510 + 62081511.

It is an arithmetic number, because the mean of its divisors is an integer number (62081511).

Almost surely, 2^124163021 is an apocalyptic number.

It is an amenable number.

124163021 is a deficient number, since it is larger than the sum of its proper divisors (1).

124163021 is an equidigital number, since it uses as much as digits as its factorization.

124163021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 124163021 is about 11142.8461803975. The cubic root of 124163021 is about 498.8815279059.

The spelling of 124163021 in words is "one hundred twenty-four million, one hundred sixty-three thousand, twenty-one".