124243420021 has 8 divisors (see below), whose sum is σ = 148166066304. Its totient is φ = 101864170320.

The previous prime is 124243420019. The next prime is 124243420039. The reversal of 124243420021 is 120024342421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 124243420021 - 2¹ = 124243420019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124243420121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385848970 + ... + 385849291.

It is an arithmetic number, because the mean of its divisors is an integer number (18520758288).

Almost surely, 2^124243420021 is an apocalyptic number.

It is an amenable number.

124243420021 is a deficient number, since it is larger than the sum of its proper divisors (23922646283).

124243420021 is an equidigital number, since it uses as much as digits as its factorization.

124243420021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771698291.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 124243420021 its reverse (120024342421), we get a palindrome (244267762442).

The spelling of 124243420021 in words is "one hundred twenty-four billion, two hundred forty-three million, four hundred twenty thousand, twenty-one".