121888193 has 4 divisors (see below), whose sum is σ = 139300800. Its totient is φ = 104475588.

The previous prime is 121888183. The next prime is 121888237. The reversal of 121888193 is 391888121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 121888193 - 2⁴ = 121888177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121888193.

It is not an unprimeable number, because it can be changed into a prime (121888103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8706293 + ... + 8706306.

It is an arithmetic number, because the mean of its divisors is an integer number (34825200).

Almost surely, 2^121888193 is an apocalyptic number.

It is an amenable number.

121888193 is a deficient number, since it is larger than the sum of its proper divisors (17412607).

121888193 is an equidigital number, since it uses as much as digits as its factorization.

121888193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17412606.

The product of its digits is 27648, while the sum is 41.

The square root of 121888193 is about 11040.2985919766. The cubic root of 121888193 is about 495.8160101159.

The spelling of 121888193 in words is "one hundred twenty-one million, eight hundred eighty-eight thousand, one hundred ninety-three".