121928171 has 2 divisors, whose sum is σ = 121928172. Its totient is φ = 121928170.

The previous prime is 121928123. The next prime is 121928197. The reversal of 121928171 is 171829121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121928171 - 2²⁶ = 54819307 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121928101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60964085 + 60964086.

It is an arithmetic number, because the mean of its divisors is an integer number (60964086).

Almost surely, 2^121928171 is an apocalyptic number.

121928171 is a deficient number, since it is larger than the sum of its proper divisors (1).

121928171 is an equidigital number, since it uses as much as digits as its factorization.

121928171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 32.

The square root of 121928171 is about 11042.1089923981. The cubic root of 121928171 is about 495.8702116079.

The spelling of 121928171 in words is "one hundred twenty-one million, nine hundred twenty-eight thousand, one hundred seventy-one".