121225171 has 2 divisors, whose sum is σ = 121225172. Its totient is φ = 121225170.

The previous prime is 121225121. The next prime is 121225189. The reversal of 121225171 is 171522121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121225171 - 2¹⁵ = 121192403 is a prime.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (121225121) 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, 60612585 + 60612586.

It is an arithmetic number, because the mean of its divisors is an integer number (60612586).

Almost surely, 2^121225171 is an apocalyptic number.

121225171 is a deficient number, since it is larger than the sum of its proper divisors (1).

121225171 is an equidigital number, since it uses as much as digits as its factorization.

121225171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 280, while the sum is 22.

The square root of 121225171 is about 11010.2302882365. The cubic root of 121225171 is about 494.9153628717.

Adding to 121225171 its reverse (171522121), we get a palindrome (292747292).

The spelling of 121225171 in words is "one hundred twenty-one million, two hundred twenty-five thousand, one hundred seventy-one".