124021021 has 2 divisors, whose sum is σ = 124021022. Its totient is φ = 124021020.

The previous prime is 124020997. The next prime is 124021033. The reversal of 124021021 is 120120421.

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., 78943225 + 45077796 = 8885^2 + 6714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124021021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 124020992 and 124021010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124001021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62010510 + 62010511.

It is an arithmetic number, because the mean of its divisors is an integer number (62010511).

Almost surely, 2^124021021 is an apocalyptic number.

It is an amenable number.

124021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

124021021 is an equidigital number, since it uses as much as digits as its factorization.

124021021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 124021021 is about 11136.4725564247. The cubic root of 124021021 is about 498.6912721181.

Adding to 124021021 its reverse (120120421), we get a palindrome (244141442).

The spelling of 124021021 in words is "one hundred twenty-four million, twenty-one thousand, twenty-one".