124055221 has 2 divisors, whose sum is σ = 124055222. Its totient is φ = 124055220.

The previous prime is 124055219. The next prime is 124055227. The reversal of 124055221 is 122550421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102292996 + 21762225 = 10114^2 + 4665^2 .

It is a cyclic number.

It is not a de Polignac number, because 124055221 - 2¹ = 124055219 is a prime.

Together with 124055219, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 124055192 and 124055201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124055227) 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 as a sum of consecutive naturals, namely, 62027610 + 62027611.

It is an arithmetic number, because the mean of its divisors is an integer number (62027611).

Almost surely, 2^124055221 is an apocalyptic number.

It is an amenable number.

124055221 is a deficient number, since it is larger than the sum of its proper divisors (1).

124055221 is an equidigital number, since it uses as much as digits as its factorization.

124055221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 124055221 is about 11138.0079457684. The cubic root of 124055221 is about 498.7371075576.

The spelling of 124055221 in words is "one hundred twenty-four million, fifty-five thousand, two hundred twenty-one".