124130221 has 4 divisors (see below), whose sum is σ = 125410012. Its totient is φ = 122850432.

The previous prime is 124130213. The next prime is 124130239. The reversal of 124130221 is 122031421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58293225 + 65836996 = 7635^2 + 8114^2 .

It is a cyclic number.

It is not a de Polignac number, because 124130221 - 2³ = 124130213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124130195 and 124130204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124130521) 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, 639750 + ... + 639943.

It is an arithmetic number, because the mean of its divisors is an integer number (31352503).

Almost surely, 2^124130221 is an apocalyptic number.

It is an amenable number.

124130221 is a deficient number, since it is larger than the sum of its proper divisors (1279791).

124130221 is an equidigital number, since it uses as much as digits as its factorization.

124130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279790.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 124130221 is about 11141.3742868643. The cubic root of 124130221 is about 498.8375943872.

Adding to 124130221 its reverse (122031421), we get a palindrome (246161642).

The spelling of 124130221 in words is "one hundred twenty-four million, one hundred thirty thousand, two hundred twenty-one".