121387187 has 2 divisors, whose sum is σ = 121387188. Its totient is φ = 121387186.

The previous prime is 121387163. The next prime is 121387267. The reversal of 121387187 is 781783121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121387187 - 2⁸ = 121386931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121387187.

It is not a weakly prime, because it can be changed into another prime (121381187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60693593 + 60693594.

It is an arithmetic number, because the mean of its divisors is an integer number (60693594).

Almost surely, 2^121387187 is an apocalyptic number.

121387187 is a deficient number, since it is larger than the sum of its proper divisors (1).

121387187 is an equidigital number, since it uses as much as digits as its factorization.

121387187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 38.

The square root of 121387187 is about 11017.5853525171. The cubic root of 121387187 is about 495.1357475534.

The spelling of 121387187 in words is "one hundred twenty-one million, three hundred eighty-seven thousand, one hundred eighty-seven".