121163128 has 32 divisors (see below), whose sum is σ = 235186560. Its totient is φ = 58458240.

The previous prime is 121163117. The next prime is 121163153. The reversal of 121163128 is 821361121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151626 + ... + 152422.

It is an arithmetic number, because the mean of its divisors is an integer number (7349580).

Almost surely, 2^121163128 is an apocalyptic number.

It is an amenable number.

121163128 is a deficient number, since it is larger than the sum of its proper divisors (114023432).

121163128 is a wasteful number, since it uses less digits than its factorization.

121163128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447 (or 1443 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 121163128 is about 11007.4124116433. The cubic root of 121163128 is about 494.8309159604.

The spelling of 121163128 in words is "one hundred twenty-one million, one hundred sixty-three thousand, one hundred twenty-eight".