21104234201 has 2 divisors, whose sum is σ = 21104234202. Its totient is φ = 21104234200.

The previous prime is 21104234183. The next prime is 21104234279. The reversal of 21104234201 is 10243240112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14963160976 + 6141073225 = 122324^2 + 78365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21104234201 is a prime.

It is not a weakly prime, because it can be changed into another prime (21104230201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10552117100 + 10552117101.

It is an arithmetic number, because the mean of its divisors is an integer number (10552117101).

Almost surely, 2^21104234201 is an apocalyptic number.

It is an amenable number.

21104234201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21104234201 is an equidigital number, since it uses as much as digits as its factorization.

21104234201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21104234201 its reverse (10243240112), we get a palindrome (31347474313).

The spelling of 21104234201 in words is "twenty-one billion, one hundred four million, two hundred thirty-four thousand, two hundred one".