221110210020017 has 2 divisors, whose sum is σ = 221110210020018. Its totient is φ = 221110210020016.

The previous prime is 221110210019947. The next prime is 221110210020019. The reversal of 221110210020017 is 710020012011122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134146453429921 + 86963756590096 = 11582161^2 + 9325436^2 .

It is a cyclic number.

It is not a de Polignac number, because 221110210020017 - 2²² = 221110205825713 is a prime.

It is a super-2 number, since 2×221110210020017² (a number of 29 digits) contains 22 as substring.

Together with 221110210020019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221110210020019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555105010008 + 110555105010009.

It is an arithmetic number, because the mean of its divisors is an integer number (110555105010009).

Almost surely, 2^{221110210020017} is an apocalyptic number.

It is an amenable number.

221110210020017 is a deficient number, since it is larger than the sum of its proper divisors (1).

221110210020017 is an equidigital number, since it uses as much as digits as its factorization.

221110210020017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 221110210020017 its reverse (710020012011122), we get a palindrome (931130222031139).

The spelling of 221110210020017 in words is "two hundred twenty-one trillion, one hundred ten billion, two hundred ten million, twenty thousand, seventeen".