124112221 has 4 divisors (see below), whose sum is σ = 124606944. Its totient is φ = 123617500.

The previous prime is 124112203. The next prime is 124112227. The reversal of 124112221 is 122211421.

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 not a de Polignac number, because 124112221 - 2¹⁷ = 123981149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124112195 and 124112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124112227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246985 + ... + 247486.

It is an arithmetic number, because the mean of its divisors is an integer number (31151736).

Almost surely, 2^124112221 is an apocalyptic number.

It is an amenable number.

124112221 is a deficient number, since it is larger than the sum of its proper divisors (494723).

124112221 is an equidigital number, since it uses as much as digits as its factorization.

124112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494722.

The product of its digits is 64, while the sum is 16.

The square root of 124112221 is about 11140.5664577704. The cubic root of 124112221 is about 498.8134812403.

Adding to 124112221 its reverse (122211421), we get a palindrome (246323642).

The spelling of 124112221 in words is "one hundred twenty-four million, one hundred twelve thousand, two hundred twenty-one".