124032221 has 4 divisors (see below), whose sum is σ = 131328252. Its totient is φ = 116736192.

The previous prime is 124032199. The next prime is 124032239. The reversal of 124032221 is 122230421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122230421 = 2803 ⋅43607.

It can be written as a sum of positive squares in 2 ways, for example, as 89680900 + 34351321 = 9470^2 + 5861^2 .

It is a cyclic number.

It is not a de Polignac number, because 124032221 - 2¹⁰ = 124031197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7296013 = 124032221 / (1 + 2 + 4 + 0 + 3 + 2 + 2 + 2 + 1).

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 124032221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124032121) 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, 3647990 + ... + 3648023.

It is an arithmetic number, because the mean of its divisors is an integer number (32832063).

Almost surely, 2^124032221 is an apocalyptic number.

It is an amenable number.

124032221 is a deficient number, since it is larger than the sum of its proper divisors (7296031).

124032221 is an equidigital number, since it uses as much as digits as its factorization.

124032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7296030.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 124032221 is about 11136.9753972971. The cubic root of 124032221 is about 498.7062834822.

Adding to 124032221 its reverse (122230421), we get a palindrome (246262642).

The spelling of 124032221 in words is "one hundred twenty-four million, thirty-two thousand, two hundred twenty-one".