121843871 has 2 divisors, whose sum is σ = 121843872. Its totient is φ = 121843870.

The previous prime is 121843867. The next prime is 121843889. The reversal of 121843871 is 178348121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121843871 - 2² = 121843867 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121843831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60921935 + 60921936.

It is an arithmetic number, because the mean of its divisors is an integer number (60921936).

Almost surely, 2^121843871 is an apocalyptic number.

121843871 is a deficient number, since it is larger than the sum of its proper divisors (1).

121843871 is an equidigital number, since it uses as much as digits as its factorization.

121843871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 35.

The square root of 121843871 is about 11038.2911268004. The cubic root of 121843871 is about 495.7559052476.

The spelling of 121843871 in words is "one hundred twenty-one million, eight hundred forty-three thousand, eight hundred seventy-one".