121688966 has 8 divisors (see below), whose sum is σ = 208609680. Its totient is φ = 52152408.

The previous prime is 121688953. The next prime is 121688989. The reversal of 121688966 is 669886121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×121688966² = 29616408892298312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121688966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4346021 + ... + 4346048.

It is an arithmetic number, because the mean of its divisors is an integer number (26076210).

Almost surely, 2^121688966 is an apocalyptic number.

121688966 is a deficient number, since it is larger than the sum of its proper divisors (86920714).

121688966 is an equidigital number, since it uses as much as digits as its factorization.

121688966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8692078.

The product of its digits is 248832, while the sum is 47.

The square root of 121688966 is about 11031.2721841137. The cubic root of 121688966 is about 495.5457246969.

The spelling of 121688966 in words is "one hundred twenty-one million, six hundred eighty-eight thousand, nine hundred sixty-six".