104520221 has 4 divisors (see below), whose sum is σ = 112560252. Its totient is φ = 96480192.

The previous prime is 104520203. The next prime is 104520223. The reversal of 104520221 is 122025401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122025401 = 9883 ⋅12347.

It can be written as a sum of positive squares in 2 ways, for example, as 9672100 + 94848121 = 3110^2 + 9739^2 .

It is a cyclic number.

It is not a de Polignac number, because 104520221 - 2²² = 100325917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 104520221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104520223) 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, 4019996 + ... + 4020021.

It is an arithmetic number, because the mean of its divisors is an integer number (28140063).

Almost surely, 2^104520221 is an apocalyptic number.

It is an amenable number.

104520221 is a deficient number, since it is larger than the sum of its proper divisors (8040031).

104520221 is an equidigital number, since it uses as much as digits as its factorization.

104520221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8040030.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 104520221 is about 10223.5131437290. The cubic root of 104520221 is about 471.0497450927.

Adding to 104520221 its reverse (122025401), we get a palindrome (226545622).

The spelling of 104520221 in words is "one hundred four million, five hundred twenty thousand, two hundred twenty-one".