121989308 has 12 divisors (see below), whose sum is σ = 243978672. Its totient is φ = 52281120.

The previous prime is 121989293. The next prime is 121989313. The reversal of 121989308 is 803989121.

121989308 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2178353 + ... + 2178408.

It is an arithmetic number, because the mean of its divisors is an integer number (20331556).

Almost surely, 2^121989308 is an apocalyptic number.

It is an amenable number.

121989308 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121989308 is a wasteful number, since it uses less digits than its factorization.

121989308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356772 (or 4356770 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 121989308 is about 11044.8770024840. The cubic root of 121989308 is about 495.9530772035.

The spelling of 121989308 in words is "one hundred twenty-one million, nine hundred eighty-nine thousand, three hundred eight".