124242213 has 4 divisors (see below), whose sum is σ = 165656288. Its totient is φ = 82828140.

The previous prime is 124242211. The next prime is 124242241. The reversal of 124242213 is 312242421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 312242421 = 3 ⋅104080807.

It is not a de Polignac number, because 124242213 - 2¹ = 124242211 is a prime.

It is a super-2 number, since 2×124242213² = 30872254982274738, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124242213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124242211) 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, 20707033 + ... + 20707038.

It is an arithmetic number, because the mean of its divisors is an integer number (41414072).

Almost surely, 2^124242213 is an apocalyptic number.

It is an amenable number.

124242213 is a deficient number, since it is larger than the sum of its proper divisors (41414075).

124242213 is an equidigital number, since it uses as much as digits as its factorization.

124242213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41414074.

The product of its digits is 768, while the sum is 21.

The square root of 124242213 is about 11146.3991046436. The cubic root of 124242213 is about 498.9875686827.

Adding to 124242213 its reverse (312242421), we get a palindrome (436484634).

The spelling of 124242213 in words is "one hundred twenty-four million, two hundred forty-two thousand, two hundred thirteen".