121017166 has 4 divisors (see below), whose sum is σ = 181525752. Its totient is φ = 60508582.

The previous prime is 121017163. The next prime is 121017167. The reversal of 121017166 is 661710121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 661710121 = 3299 ⋅200579.

It is a self number, because there is not a number n which added to its sum of digits gives 121017166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121017161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30254290 + ... + 30254293.

It is an arithmetic number, because the mean of its divisors is an integer number (45381438).

Almost surely, 2^121017166 is an apocalyptic number.

121017166 is a deficient number, since it is larger than the sum of its proper divisors (60508586).

121017166 is an equidigital number, since it uses as much as digits as its factorization.

121017166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60508585.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 121017166 is about 11000.7802450553. The cubic root of 121017166 is about 494.6321328985.

Adding to 121017166 its reverse (661710121), we get a palindrome (782727287).

The spelling of 121017166 in words is "one hundred twenty-one million, seventeen thousand, one hundred sixty-six".