121221120170 has 64 divisors (see below), whose sum is σ = 222875525376. Its totient is φ = 47460672000.

The previous prime is 121221120169. The next prime is 121221120187. The reversal of 121221120170 is 71021122121.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 58082867 + ... + 58084953.

It is an arithmetic number, because the mean of its divisors is an integer number (3482430084).

Almost surely, 2^121221120170 is an apocalyptic number.

121221120170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221120170 is a deficient number, since it is larger than the sum of its proper divisors (101654405206).

121221120170 is a wasteful number, since it uses less digits than its factorization.

121221120170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 121221120170 its reverse (71021122121), we get a palindrome (192242242291).

The spelling of 121221120170 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred seventy".