104001221 has 8 divisors (see below), whose sum is σ = 108376920. Its totient is φ = 99678208.

The previous prime is 104001203. The next prime is 104001253. The reversal of 104001221 is 122100401.

It can be written as a sum of positive squares in 4 ways, for example, as 47541025 + 56460196 = 6895^2 + 7514^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104001221 is a prime.

It is a Duffinian number.

104001221 is a modest number, since divided by 1221 gives 104 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104001281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9116 + ... + 17061.

It is an arithmetic number, because the mean of its divisors is an integer number (13547115).

Almost surely, 2^104001221 is an apocalyptic number.

It is an amenable number.

104001221 is a deficient number, since it is larger than the sum of its proper divisors (4375699).

104001221 is a wasteful number, since it uses less digits than its factorization.

104001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26343.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 104001221 is about 10198.0988914601. The cubic root of 104001221 is about 470.2687779085.

Adding to 104001221 its reverse (122100401), we get a palindrome (226101622).

The spelling of 104001221 in words is "one hundred four million, one thousand, two hundred twenty-one".