124501210021 has 2 divisors, whose sum is σ = 124501210022. Its totient is φ = 124501210020.

The previous prime is 124501209983. The next prime is 124501210027. The reversal of 124501210021 is 120012105421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75894189121 + 48607020900 = 275489^2 + 220470^2 .

It is a cyclic number.

It is not a de Polignac number, because 124501210021 - 2⁷ = 124501209893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124501210027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62250605010 + 62250605011.

It is an arithmetic number, because the mean of its divisors is an integer number (62250605011).

Almost surely, 2^124501210021 is an apocalyptic number.

It is an amenable number.

124501210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

124501210021 is an equidigital number, since it uses as much as digits as its factorization.

124501210021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 124501210021 its reverse (120012105421), we get a palindrome (244513315442).

The spelling of 124501210021 in words is "one hundred twenty-four billion, five hundred one million, two hundred ten thousand, twenty-one".