121045128808 has 8 divisors (see below), whose sum is σ = 226959616530. Its totient is φ = 60522564400.

The previous prime is 121045128793. The next prime is 121045128817. The reversal of 121045128808 is 808821540121.

It can be written as a sum of positive squares in only one way, i.e., 115272472324 + 5772656484 = 339518^2 + 75978^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7565320543 + ... + 7565320558.

Almost surely, 2^121045128808 is an apocalyptic number.

It is an amenable number.

121045128808 is a deficient number, since it is larger than the sum of its proper divisors (105914487722).

121045128808 is a wasteful number, since it uses less digits than its factorization.

121045128808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15130641107 (or 15130641103 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 40.

Adding to 121045128808 its reverse (808821540121), we get a palindrome (929866668929).

The spelling of 121045128808 in words is "one hundred twenty-one billion, forty-five million, one hundred twenty-eight thousand, eight hundred eight".