124421213 has 4 divisors (see below), whose sum is σ = 142195680. Its totient is φ = 106646748.

The previous prime is 124421207. The next prime is 124421239. The reversal of 124421213 is 312124421.

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 124421213 - 2⁶ = 124421149 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 (124421243) 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, 8887223 + ... + 8887236.

It is an arithmetic number, because the mean of its divisors is an integer number (35548920).

Almost surely, 2^124421213 is an apocalyptic number.

It is an amenable number.

124421213 is a deficient number, since it is larger than the sum of its proper divisors (17774467).

124421213 is an equidigital number, since it uses as much as digits as its factorization.

124421213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17774466.

The product of its digits is 384, while the sum is 20.

The square root of 124421213 is about 11154.4257135901. The cubic root of 124421213 is about 499.2270898354.

Adding to 124421213 its reverse (312124421), we get a palindrome (436545634).

The spelling of 124421213 in words is "one hundred twenty-four million, four hundred twenty-one thousand, two hundred thirteen".