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12104021 is a prime number
BaseRepresentation
bin101110001011…
…000101010101
3211202221121002
4232023011111
511044312041
61111233045
7204611456
oct56130525
924687532
1012104021
116917a26
124078785
13267a457
14187112d
1510e159b
hexb8b155

12104021 has 2 divisors, whose sum is σ = 12104022. Its totient is φ = 12104020.

The previous prime is 12103999. The next prime is 12104033. The reversal of 12104021 is 12040121.

12104021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10491121 + 1612900 = 3239^2 + 1270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12104021 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12103993 and 12104011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12104041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6052010 + 6052011.

It is an arithmetic number, because the mean of its divisors is an integer number (6052011).

Almost surely, 212104021 is an apocalyptic number.

It is an amenable number.

12104021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12104021 is an equidigital number, since it uses as much as digits as its factorization.

12104021 is an evil number, because the sum of its binary digits is even.

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

The square root of 12104021 is about 3479.0833562880. The cubic root of 12104021 is about 229.6024702090.

Adding to 12104021 its reverse (12040121), we get a palindrome (24144142).

The spelling of 12104021 in words is "twelve million, one hundred four thousand, twenty-one".