121387169 has 8 divisors (see below), whose sum is σ = 127032192. Its totient is φ = 115772800.

The previous prime is 121387163. The next prime is 121387187. The reversal of 121387169 is 961783121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121387169 - 2⁸ = 121386913 is a prime.

It is a super-2 number, since 2×121387169² = 29469689595669122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121387163) 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 in 7 ways as a sum of consecutive naturals, for example, 644 + ... + 15594.

It is an arithmetic number, because the mean of its divisors is an integer number (15879024).

Almost surely, 2^121387169 is an apocalyptic number.

It is an amenable number.

121387169 is a deficient number, since it is larger than the sum of its proper divisors (5645023).

121387169 is a wasteful number, since it uses less digits than its factorization.

121387169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15327.

The product of its digits is 18144, while the sum is 38.

The square root of 121387169 is about 11017.5845356412. The cubic root of 121387169 is about 495.1357230795.

The spelling of 121387169 in words is "one hundred twenty-one million, three hundred eighty-seven thousand, one hundred sixty-nine".