104021021 has 6 divisors (see below), whose sum is σ = 112638330. Its totient is φ = 96019248.

The previous prime is 104021003. The next prime is 104021069. The reversal of 104021021 is 120120401.

It can be written as a sum of positive squares in 3 ways, for example, as 5812921 + 98208100 = 2411^2 + 9910^2 .

It is not a de Polignac number, because 104021021 - 2¹⁸ = 103758877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 104020993 and 104021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104021921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 307586 + ... + 307923.

It is an arithmetic number, because the mean of its divisors is an integer number (18773055).

Almost surely, 2^104021021 is an apocalyptic number.

It is an amenable number.

104021021 is a deficient number, since it is larger than the sum of its proper divisors (8617309).

104021021 is an equidigital number, since it uses as much as digits as its factorization.

104021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615535 (or 615522 counting only the distinct ones).

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

The square root of 104021021 is about 10199.0696144305. The cubic root of 104021021 is about 470.2986196446.

Adding to 104021021 its reverse (120120401), we get a palindrome (224141422).

The spelling of 104021021 in words is "one hundred four million, twenty-one thousand, twenty-one".