121881173 has 2 divisors, whose sum is σ = 121881174. Its totient is φ = 121881172.

The previous prime is 121881161. The next prime is 121881191. The reversal of 121881173 is 371188121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117115684 + 4765489 = 10822^2 + 2183^2 .

It is an emirp because it is prime and its reverse (371188121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121881173 - 2¹⁶ = 121815637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121881103) 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, 60940586 + 60940587.

It is an arithmetic number, because the mean of its divisors is an integer number (60940587).

Almost surely, 2^121881173 is an apocalyptic number.

It is an amenable number.

121881173 is a deficient number, since it is larger than the sum of its proper divisors (1).

121881173 is an equidigital number, since it uses as much as digits as its factorization.

121881173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 32.

The square root of 121881173 is about 11039.9806612149. The cubic root of 121881173 is about 495.8064912962.

The spelling of 121881173 in words is "one hundred twenty-one million, eight hundred eighty-one thousand, one hundred seventy-three".