121679899 has 6 divisors (see below), whose sum is σ = 133747460. Its totient is φ = 110617980.

The previous prime is 121679893. The next prime is 121679917. The reversal of 121679899 is 998976121.

It is not a de Polignac number, because 121679899 - 2¹¹ = 121677851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121679893) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 502689 + ... + 502930.

Almost surely, 2^121679899 is an apocalyptic number.

121679899 is a deficient number, since it is larger than the sum of its proper divisors (12067561).

121679899 is a wasteful number, since it uses less digits than its factorization.

121679899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005641 (or 1005630 counting only the distinct ones).

The product of its digits is 489888, while the sum is 52.

The square root of 121679899 is about 11030.8612084461. The cubic root of 121679899 is about 495.5334167481.

The spelling of 121679899 in words is "one hundred twenty-one million, six hundred seventy-nine thousand, eight hundred ninety-nine".