121660305 has 32 divisors (see below), whose sum is σ = 210760704. Its totient is φ = 59571456.

The previous prime is 121660223. The next prime is 121660349. The reversal of 121660305 is 503066121.

It is not a de Polignac number, because 121660305 - 2¹² = 121656209 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36832 + ... + 39998.

It is an arithmetic number, because the mean of its divisors is an integer number (6586272).

Almost surely, 2^121660305 is an apocalyptic number.

121660305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121660305 is a deficient number, since it is larger than the sum of its proper divisors (89100399).

121660305 is a wasteful number, since it uses less digits than its factorization.

121660305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3385.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 121660305 is about 11029.9730280722. The cubic root of 121660305 is about 495.5068168931.

The spelling of 121660305 in words is "one hundred twenty-one million, six hundred sixty thousand, three hundred five".