121020100171 has 2 divisors, whose sum is σ = 121020100172. Its totient is φ = 121020100170.

The previous prime is 121020100139. The next prime is 121020100213. The reversal of 121020100171 is 171001020121.

It is a weak prime.

It is an emirp because it is prime and its reverse (171001020121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121020100171 - 2⁵ = 121020100139 is a prime.

It is not a weakly prime, because it can be changed into another prime (121020170171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510050085 + 60510050086.

It is an arithmetic number, because the mean of its divisors is an integer number (60510050086).

Almost surely, 2^121020100171 is an apocalyptic number.

121020100171 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020100171 is an equidigital number, since it uses as much as digits as its factorization.

121020100171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 121020100171 its reverse (171001020121), we get a palindrome (292021120292).

The spelling of 121020100171 in words is "one hundred twenty-one billion, twenty million, one hundred thousand, one hundred seventy-one".