21432100123417 has 2 divisors, whose sum is σ = 21432100123418. Its totient is φ = 21432100123416.

The previous prime is 21432100123403. The next prime is 21432100123529. The reversal of 21432100123417 is 71432100123412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21169237808016 + 262862315401 = 4601004^2 + 512701^2 .

It is a cyclic number.

It is not a de Polignac number, because 21432100123417 - 2²⁷ = 21431965905689 is a prime.

It is not a weakly prime, because it can be changed into another prime (21432100121417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716050061708 + 10716050061709.

It is an arithmetic number, because the mean of its divisors is an integer number (10716050061709).

Almost surely, 2^{21432100123417} is an apocalyptic number.

It is an amenable number.

21432100123417 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432100123417 is an equidigital number, since it uses as much as digits as its factorization.

21432100123417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 21432100123417 its reverse (71432100123412), we get a palindrome (92864200246829).

The spelling of 21432100123417 in words is "twenty-one trillion, four hundred thirty-two billion, one hundred million, one hundred twenty-three thousand, four hundred seventeen".