121165500066 has 32 divisors (see below), whose sum is σ = 264116099520. Its totient is φ = 36832513344.

The previous prime is 121165500047. The next prime is 121165500073. The reversal of 121165500066 is 660005561121.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9351381 + ... + 9364328.

It is an arithmetic number, because the mean of its divisors is an integer number (8253628110).

Almost surely, 2^121165500066 is an apocalyptic number.

121165500066 is an abundant number, since it is smaller than the sum of its proper divisors (142950599454).

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

121165500066 is a wasteful number, since it uses less digits than its factorization.

121165500066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18715810.

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 121165500066 in words is "one hundred twenty-one billion, one hundred sixty-five million, five hundred thousand, sixty-six".