121128342 has 8 divisors (see below), whose sum is σ = 242256696. Its totient is φ = 40376112.

The previous prime is 121128341. The next prime is 121128379. The reversal of 121128342 is 243821121.

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

121128342 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121128341) 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, 10094023 + ... + 10094034.

It is an arithmetic number, because the mean of its divisors is an integer number (30282087).

Almost surely, 2^121128342 is an apocalyptic number.

121128342 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121128342 is a wasteful number, since it uses less digits than its factorization.

121128342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20188062.

The product of its digits is 768, while the sum is 24.

The square root of 121128342 is about 11005.8321811665. The cubic root of 121128342 is about 494.7835560193.

Adding to 121128342 its reverse (243821121), we get a palindrome (364949463).

The spelling of 121128342 in words is "one hundred twenty-one million, one hundred twenty-eight thousand, three hundred forty-two".