221020112102017 has 2 divisors, whose sum is σ = 221020112102018. Its totient is φ = 221020112102016.

The previous prime is 221020112101967. The next prime is 221020112102071. The reversal of 221020112102017 is 710201211020122.

Together with next prime (221020112102071) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210825782665281 + 10194329436736 = 14519841^2 + 3192856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221020112102017 is a prime.

It is not a weakly prime, because it can be changed into another prime (221020112142017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510056051008 + 110510056051009.

It is an arithmetic number, because the mean of its divisors is an integer number (110510056051009).

Almost surely, 2^{221020112102017} is an apocalyptic number.

It is an amenable number.

221020112102017 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020112102017 is an equidigital number, since it uses as much as digits as its factorization.

221020112102017 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 221020112102017 its reverse (710201211020122), we get a palindrome (931221323122139).

The spelling of 221020112102017 in words is "two hundred twenty-one trillion, twenty billion, one hundred twelve million, one hundred two thousand, seventeen".