121382163 has 72 divisors (see below), whose sum is σ = 215577648. Its totient is φ = 65536128.

The previous prime is 121382147. The next prime is 121382171. The reversal of 121382163 is 361283121.

It is a happy number.

121382163 is a `hidden beast` number, since 121 + 382 + 163 = 666.

It is not a de Polignac number, because 121382163 - 2⁴ = 121382147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121380163) 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 71 ways as a sum of consecutive naturals, for example, 701545 + ... + 701717.

It is an arithmetic number, because the mean of its divisors is an integer number (2994134).

Almost surely, 2^121382163 is an apocalyptic number.

121382163 is a deficient number, since it is larger than the sum of its proper divisors (94195485).

121382163 is a wasteful number, since it uses less digits than its factorization.

121382163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 263 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 121382163 is about 11017.3573510166. The cubic root of 121382163 is about 495.1289165295.

The spelling of 121382163 in words is "one hundred twenty-one million, three hundred eighty-two thousand, one hundred sixty-three".