121112171 has 2 divisors, whose sum is σ = 121112172. Its totient is φ = 121112170.

The previous prime is 121112129. The next prime is 121112177. The reversal of 121112171 is 171211121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121112171 - 2⁶ = 121112107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (121112177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60556085 + 60556086.

It is an arithmetic number, because the mean of its divisors is an integer number (60556086).

Almost surely, 2^121112171 is an apocalyptic number.

121112171 is a deficient number, since it is larger than the sum of its proper divisors (1).

121112171 is an equidigital number, since it uses as much as digits as its factorization.

121112171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28, while the sum is 17.

The square root of 121112171 is about 11005.0975007039. The cubic root of 121112171 is about 494.7615366723.

Adding to 121112171 its reverse (171211121), we get a palindrome (292323292).

The spelling of 121112171 in words is "one hundred twenty-one million, one hundred twelve thousand, one hundred seventy-one".