121911611289 has 32 divisors (see below), whose sum is σ = 176300651520. Its totient is φ = 74932101504.

The previous prime is 121911611273. The next prime is 121911611291. The reversal of 121911611289 is 982116119121.

It is not a de Polignac number, because 121911611289 - 2⁴ = 121911611273 is a prime.

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 121911611289.

It is not an unprimeable number, because it can be changed into a prime (121913611289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5677317 + ... + 5698749.

It is an arithmetic number, because the mean of its divisors is an integer number (5509395360).

Almost surely, 2^121911611289 is an apocalyptic number.

It is an amenable number.

121911611289 is a deficient number, since it is larger than the sum of its proper divisors (54389040231).

121911611289 is an equidigital number, since it uses as much as digits as its factorization.

121911611289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22338 (or 22312 counting only the distinct ones).

The product of its digits is 15552, while the sum is 42.

The spelling of 121911611289 in words is "one hundred twenty-one billion, nine hundred eleven million, six hundred eleven thousand, two hundred eighty-nine".