121171216 has 20 divisors (see below), whose sum is σ = 235178524. Its totient is φ = 60480000.

The previous prime is 121171207. The next prime is 121171229. The reversal of 121171216 is 612171121.

It can be written as a sum of positive squares in 2 ways, for example, as 73616400 + 47554816 = 8580^2 + 6896^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3316 + ... + 15916.

Almost surely, 2^121171216 is an apocalyptic number.

121171216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121171216 is a deficient number, since it is larger than the sum of its proper divisors (114007308).

121171216 is a wasteful number, since it uses less digits than its factorization.

121171216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13210 (or 13204 counting only the distinct ones).

The product of its digits is 168, while the sum is 22.

The square root of 121171216 is about 11007.7797943091. The cubic root of 121171216 is about 494.8419261950.

It can be divided in two parts, 1211 and 71216, that added together give a palindrome (72427).

The spelling of 121171216 in words is "one hundred twenty-one million, one hundred seventy-one thousand, two hundred sixteen".