121111102100017 has 2 divisors, whose sum is σ = 121111102100018. Its totient is φ = 121111102100016.

The previous prime is 121111102099993. The next prime is 121111102100099. The reversal of 121111102100017 is 710001201111121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120824415744256 + 286686355761 = 10992016^2 + 535431^2 .

It is a cyclic number.

It is not a de Polignac number, because 121111102100017 - 2¹¹ = 121111102097969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121111102099967 and 121111102100003.

It is not a weakly prime, because it can be changed into another prime (121111102100117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555551050008 + 60555551050009.

It is an arithmetic number, because the mean of its divisors is an integer number (60555551050009).

Almost surely, 2^{121111102100017} is an apocalyptic number.

It is an amenable number.

121111102100017 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111102100017 is an equidigital number, since it uses as much as digits as its factorization.

121111102100017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 19.

Adding to 121111102100017 its reverse (710001201111121), we get a palindrome (831112303211138).

The spelling of 121111102100017 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred two million, one hundred thousand, seventeen".