121478528017 has 36 divisors (see below), whose sum is σ = 155834429520. Its totient is φ = 94348845360.

The previous prime is 121478527999. The next prime is 121478528027. The reversal of 121478528017 is 710825874121.

It is a de Polignac number, because none of the positive numbers 2^k-121478528017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121478528027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1786834 + ... + 1853572.

Almost surely, 2^121478528017 is an apocalyptic number.

It is an amenable number.

121478528017 is a deficient number, since it is larger than the sum of its proper divisors (34355901503).

121478528017 is a wasteful number, since it uses less digits than its factorization.

121478528017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67082 (or 67064 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 46.

The spelling of 121478528017 in words is "one hundred twenty-one billion, four hundred seventy-eight million, five hundred twenty-eight thousand, seventeen".