121688411 has 4 divisors (see below), whose sum is σ = 131049072. Its totient is φ = 112327752.

The previous prime is 121688339. The next prime is 121688419. The reversal of 121688411 is 114886121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121688411 - 2¹⁴ = 121672027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121688419) by changing a digit.

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, 4680311 + ... + 4680336.

It is an arithmetic number, because the mean of its divisors is an integer number (32762268).

Almost surely, 2^121688411 is an apocalyptic number.

121688411 is a deficient number, since it is larger than the sum of its proper divisors (9360661).

121688411 is an equidigital number, since it uses as much as digits as its factorization.

121688411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9360660.

The product of its digits is 3072, while the sum is 32.

The square root of 121688411 is about 11031.2470283282. The cubic root of 121688411 is about 495.5449713328.

The spelling of 121688411 in words is "one hundred twenty-one million, six hundred eighty-eight thousand, four hundred eleven".