21222101201017 has 2 divisors, whose sum is σ = 21222101201018. Its totient is φ = 21222101201016.

The previous prime is 21222101201003. The next prime is 21222101201023. The reversal of 21222101201017 is 71010210122212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21221906012176 + 195188841 = 4606724^2 + 13971^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222101201017 - 2¹⁵ = 21222101168249 is a prime.

It is not a weakly prime, because it can be changed into another prime (21222101201117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611050600508 + 10611050600509.

It is an arithmetic number, because the mean of its divisors is an integer number (10611050600509).

Almost surely, 2^{21222101201017} is an apocalyptic number.

It is an amenable number.

21222101201017 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222101201017 is an equidigital number, since it uses as much as digits as its factorization.

21222101201017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 21222101201017 its reverse (71010210122212), we get a palindrome (92232311323229).

The spelling of 21222101201017 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred one million, two hundred one thousand, seventeen".