121166978 has 4 divisors (see below), whose sum is σ = 181750470. Its totient is φ = 60583488.

The previous prime is 121166911. The next prime is 121166999. The reversal of 121166978 is 879661121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 113784889 + 7382089 = 10667^2 + 2717^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30291743 + ... + 30291746.

Almost surely, 2^121166978 is an apocalyptic number.

121166978 is a deficient number, since it is larger than the sum of its proper divisors (60583492).

121166978 is an equidigital number, since it uses as much as digits as its factorization.

121166978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60583491.

The product of its digits is 36288, while the sum is 41.

The square root of 121166978 is about 11007.5872924088. The cubic root of 121166978 is about 494.8361570456.

The spelling of 121166978 in words is "one hundred twenty-one million, one hundred sixty-six thousand, nine hundred seventy-eight".