121660125 has 16 divisors (see below), whose sum is σ = 202443072. Its totient is φ = 64885200.

The previous prime is 121660081. The next prime is 121660127. The reversal of 121660125 is 521066121.

It is not a de Polignac number, because 121660125 - 2⁶ = 121660061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121660095 and 121660104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121660127) 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 15 ways as a sum of consecutive naturals, for example, 161839 + ... + 162588.

It is an arithmetic number, because the mean of its divisors is an integer number (12652692).

Almost surely, 2^121660125 is an apocalyptic number.

121660125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121660125 is a deficient number, since it is larger than the sum of its proper divisors (80782947).

121660125 is an equidigital number, since it uses as much as digits as its factorization.

121660125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324445 (or 324435 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 121660125 is about 11029.9648684844. The cubic root of 121660125 is about 495.5065725207.

The spelling of 121660125 in words is "one hundred twenty-one million, six hundred sixty thousand, one hundred twenty-five".