21223100032217 has 2 divisors, whose sum is σ = 21223100032218. Its totient is φ = 21223100032216.

The previous prime is 21223100032213. The next prime is 21223100032243. The reversal of 21223100032217 is 71223000132212.

It is an a-pointer prime, because the next prime (21223100032243) can be obtained adding 21223100032217 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21200324393161 + 22775639056 = 4604381^2 + 150916^2 .

It is a cyclic number.

It is not a de Polignac number, because 21223100032217 - 2² = 21223100032213 is a prime.

It is not a weakly prime, because it can be changed into another prime (21223100032213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611550016108 + 10611550016109.

It is an arithmetic number, because the mean of its divisors is an integer number (10611550016109).

Almost surely, 2^{21223100032217} is an apocalyptic number.

It is an amenable number.

21223100032217 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223100032217 is an equidigital number, since it uses as much as digits as its factorization.

21223100032217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 21223100032217 its reverse (71223000132212), we get a palindrome (92446100164429).

The spelling of 21223100032217 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred million, thirty-two thousand, two hundred seventeen".