124401310021 has 2 divisors, whose sum is σ = 124401310022. Its totient is φ = 124401310020.

The previous prime is 124401309997. The next prime is 124401310123. The reversal of 124401310021 is 120013104421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118949112100 + 5452197921 = 344890^2 + 73839^2 .

It is a cyclic number.

It is not a de Polignac number, because 124401310021 - 2⁹ = 124401309509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124401316021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62200655010 + 62200655011.

It is an arithmetic number, because the mean of its divisors is an integer number (62200655011).

Almost surely, 2^124401310021 is an apocalyptic number.

It is an amenable number.

124401310021 is a deficient number, since it is larger than the sum of its proper divisors (1).

124401310021 is an equidigital number, since it uses as much as digits as its factorization.

124401310021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 124401310021 its reverse (120013104421), we get a palindrome (244414414442).

The spelling of 124401310021 in words is "one hundred twenty-four billion, four hundred one million, three hundred ten thousand, twenty-one".