121161552166 has 16 divisors (see below), whose sum is σ = 185184486144. Its totient is φ = 59433551424.

The previous prime is 121161552163. The next prime is 121161552173. The reversal of 121161552166 is 661255161121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121161552163) 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 7 ways as a sum of consecutive naturals, for example, 1915786 + ... + 1978018.

It is an arithmetic number, because the mean of its divisors is an integer number (11574030384).

Almost surely, 2^121161552166 is an apocalyptic number.

121161552166 is a deficient number, since it is larger than the sum of its proper divisors (64022933978).

121161552166 is a wasteful number, since it uses less digits than its factorization.

121161552166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80655.

The product of its digits is 21600, while the sum is 37.

The spelling of 121161552166 in words is "one hundred twenty-one billion, one hundred sixty-one million, five hundred fifty-two thousand, one hundred sixty-six".