124420221 has 12 divisors (see below), whose sum is σ = 180093472. Its totient is φ = 82773576.

The previous prime is 124420217. The next prime is 124420223. The reversal of 124420221 is 122024421.

124420221 is a `hidden beast` number, since 1 + 2 + 442 + 0 + 221 = 666.

It is not a de Polignac number, because 124420221 - 2² = 124420217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124420194 and 124420203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124420223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9811 + ... + 18576.

Almost surely, 2^124420221 is an apocalyptic number.

It is an amenable number.

124420221 is a deficient number, since it is larger than the sum of its proper divisors (55673251).

124420221 is a wasteful number, since it uses less digits than its factorization.

124420221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28880 (or 28877 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 124420221 is about 11154.3812468465. The cubic root of 124420221 is about 499.2257630665.

Adding to 124420221 its reverse (122024421), we get a palindrome (246444642).

The spelling of 124420221 in words is "one hundred twenty-four million, four hundred twenty thousand, two hundred twenty-one".