121188871 has 2 divisors, whose sum is σ = 121188872. Its totient is φ = 121188870.

The previous prime is 121188857. The next prime is 121188877. The reversal of 121188871 is 178881121.

It is a strong prime.

It is an emirp because it is prime and its reverse (178881121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121188871 - 2⁵ = 121188839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121188871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121188877) 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, 60594435 + 60594436.

It is an arithmetic number, because the mean of its divisors is an integer number (60594436).

Almost surely, 2^121188871 is an apocalyptic number.

121188871 is a deficient number, since it is larger than the sum of its proper divisors (1).

121188871 is an equidigital number, since it uses as much as digits as its factorization.

121188871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 37.

The square root of 121188871 is about 11008.5816979300. The cubic root of 121188871 is about 494.8659583324.

The spelling of 121188871 in words is "one hundred twenty-one million, one hundred eighty-eight thousand, eight hundred seventy-one".