124230021 has 4 divisors (see below), whose sum is σ = 165640032. Its totient is φ = 82820012.

The previous prime is 124229983. The next prime is 124230031. The reversal of 124230021 is 120032421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 124230021 - 2²² = 120035717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124230031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20705001 + ... + 20705006.

It is an arithmetic number, because the mean of its divisors is an integer number (41410008).

Almost surely, 2^124230021 is an apocalyptic number.

It is an amenable number.

124230021 is a deficient number, since it is larger than the sum of its proper divisors (41410011).

124230021 is an equidigital number, since it uses as much as digits as its factorization.

124230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41410010.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 124230021 is about 11145.8521881460. The cubic root of 124230021 is about 498.9712461159.

Adding to 124230021 its reverse (120032421), we get a palindrome (244262442).

The spelling of 124230021 in words is "one hundred twenty-four million, two hundred thirty thousand, twenty-one".