104240221 has 2 divisors, whose sum is σ = 104240222. Its totient is φ = 104240220.

The previous prime is 104240207. The next prime is 104240261. The reversal of 104240221 is 122042401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84437721 + 19802500 = 9189^2 + 4450^2 .

It is a cyclic number.

It is not a de Polignac number, because 104240221 - 2⁵ = 104240189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 104240195 and 104240204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104240261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52120110 + 52120111.

It is an arithmetic number, because the mean of its divisors is an integer number (52120111).

Almost surely, 2^104240221 is an apocalyptic number.

It is an amenable number.

104240221 is a deficient number, since it is larger than the sum of its proper divisors (1).

104240221 is an equidigital number, since it uses as much as digits as its factorization.

104240221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 104240221 is about 10209.8100374101. The cubic root of 104240221 is about 470.6287360280.

Adding to 104240221 its reverse (122042401), we get a palindrome (226282622).

The spelling of 104240221 in words is "one hundred four million, two hundred forty thousand, two hundred twenty-one".