121968686 has 32 divisors (see below), whose sum is σ = 216373248. Its totient is φ = 50477760.

The previous prime is 121968667. The next prime is 121968703. The reversal of 121968686 is 686869121.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121968686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58091 + ... + 60153.

It is an arithmetic number, because the mean of its divisors is an integer number (6761664).

Almost surely, 2^121968686 is an apocalyptic number.

121968686 is a deficient number, since it is larger than the sum of its proper divisors (94404562).

121968686 is a wasteful number, since it uses less digits than its factorization.

121968686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216.

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

The square root of 121968686 is about 11043.9434080404. The cubic root of 121968686 is about 495.9251290691.

The spelling of 121968686 in words is "one hundred twenty-one million, nine hundred sixty-eight thousand, six hundred eighty-six".