124001021 has 2 divisors, whose sum is σ = 124001022. Its totient is φ = 124001020.

The previous prime is 124000999. The next prime is 124001041. The reversal of 124001021 is 120100421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114789796 + 9211225 = 10714^2 + 3035^2 .

It is a cyclic number.

It is not a de Polignac number, because 124001021 - 2¹⁸ = 123738877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 124000993 and 124001011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124001041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62000510 + 62000511.

It is an arithmetic number, because the mean of its divisors is an integer number (62000511).

Almost surely, 2^124001021 is an apocalyptic number.

It is an amenable number.

124001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

124001021 is an equidigital number, since it uses as much as digits as its factorization.

124001021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 124001021 is about 11135.5745698190. The cubic root of 124001021 is about 498.6644638626.

Adding to 124001021 its reverse (120100421), we get a palindrome (244101442).

The spelling of 124001021 in words is "one hundred twenty-four million, one thousand, twenty-one".