104820121 has 4 divisors (see below), whose sum is σ = 119794432. Its totient is φ = 89845812.

The previous prime is 104820109. The next prime is 104820127. The reversal of 104820121 is 121028401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 104820121 - 2¹⁷ = 104689049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104820127) 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 3 ways as a sum of consecutive naturals, for example, 7487145 + ... + 7487158.

It is an arithmetic number, because the mean of its divisors is an integer number (29948608).

Almost surely, 2^104820121 is an apocalyptic number.

It is an amenable number.

104820121 is a deficient number, since it is larger than the sum of its proper divisors (14974311).

104820121 is an equidigital number, since it uses as much as digits as its factorization.

104820121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14974310.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 104820121 is about 10238.1698071482. The cubic root of 104820121 is about 471.4998427512.

Adding to 104820121 its reverse (121028401), we get a palindrome (225848522).

The spelling of 104820121 in words is "one hundred four million, eight hundred twenty thousand, one hundred twenty-one".