104121021 has 4 divisors (see below), whose sum is σ = 138828032. Its totient is φ = 69414012.

The previous prime is 104121019. The next prime is 104121029. The reversal of 104121021 is 120121401.

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 104121021 - 2¹ = 104121019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 104120988 and 104121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104121029) 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, 17353501 + ... + 17353506.

It is an arithmetic number, because the mean of its divisors is an integer number (34707008).

Almost surely, 2^104121021 is an apocalyptic number.

It is an amenable number.

104121021 is a deficient number, since it is larger than the sum of its proper divisors (34707011).

104121021 is an equidigital number, since it uses as much as digits as its factorization.

104121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34707010.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 104121021 is about 10203.9708447251. The cubic root of 104121021 is about 470.4492776524.

Adding to 104121021 its reverse (120121401), we get a palindrome (224242422).

The spelling of 104121021 in words is "one hundred four million, one hundred twenty-one thousand, twenty-one".