121680118 has 16 divisors (see below), whose sum is σ = 220865184. Its totient is φ = 49080960.

The previous prime is 121680109. The next prime is 121680121. The reversal of 121680118 is 811086121.

It is a super-2 number, since 2×121680118² = 29612102232987848, which contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 255393 + ... + 255868.

It is an arithmetic number, because the mean of its divisors is an integer number (13804074).

Almost surely, 2^121680118 is an apocalyptic number.

121680118 is a deficient number, since it is larger than the sum of its proper divisors (99185066).

121680118 is a wasteful number, since it uses less digits than its factorization.

121680118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511287.

The product of its (nonzero) digits is 768, while the sum is 28.

The square root of 121680118 is about 11030.8711351371. The cubic root of 121680118 is about 495.5337140356.

The spelling of 121680118 in words is "one hundred twenty-one million, six hundred eighty thousand, one hundred eighteen".