124711221 has 12 divisors (see below), whose sum is σ = 173827808. Its totient is φ = 79524984.

The previous prime is 124711199. The next prime is 124711243. The reversal of 124711221 is 122117421.

It is an interprime number because it is at equal distance from previous prime (124711199) and next prime (124711243).

It is not a de Polignac number, because 124711221 - 2⁶ = 124711157 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 (124711261) 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 11 ways as a sum of consecutive naturals, for example, 37705 + ... + 40878.

Almost surely, 2^124711221 is an apocalyptic number.

It is an amenable number.

124711221 is a deficient number, since it is larger than the sum of its proper divisors (49116587).

124711221 is an equidigital number, since it uses as much as digits as its factorization.

124711221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78632 (or 78609 counting only the distinct ones).

The product of its digits is 224, while the sum is 21.

The square root of 124711221 is about 11167.4178304566. The cubic root of 124711221 is about 499.6146644426.

Adding to 124711221 its reverse (122117421), we get a palindrome (246828642).

The spelling of 124711221 in words is "one hundred twenty-four million, seven hundred eleven thousand, two hundred twenty-one".