121075661128 has 64 divisors (see below), whose sum is σ = 236380446720. Its totient is φ = 58075867200.

The previous prime is 121075661093. The next prime is 121075661129. The reversal of 121075661128 is 821166570121.

It is not an unprimeable number, because it can be changed into a prime (121075661129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49478001 + ... + 49480447.

It is an arithmetic number, because the mean of its divisors is an integer number (3693444480).

Almost surely, 2^121075661128 is an apocalyptic number.

It is an amenable number.

121075661128 is a deficient number, since it is larger than the sum of its proper divisors (115304785592).

121075661128 is a wasteful number, since it uses less digits than its factorization.

121075661128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4138 (or 4134 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 121075661128 in words is "one hundred twenty-one billion, seventy-five million, six hundred sixty-one thousand, one hundred twenty-eight".