121801115 has 8 divisors (see below), whose sum is σ = 153854160. Its totient is φ = 92312352.

The previous prime is 121801103. The next prime is 121801117. The reversal of 121801115 is 511108121.

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

It is a cyclic number.

It is not a de Polignac number, because 121801115 - 2⁸ = 121800859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121801117) 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 7 ways as a sum of consecutive naturals, for example, 640964 + ... + 641153.

It is an arithmetic number, because the mean of its divisors is an integer number (19231770).

Almost surely, 2^121801115 is an apocalyptic number.

121801115 is a deficient number, since it is larger than the sum of its proper divisors (32053045).

121801115 is a wasteful number, since it uses less digits than its factorization.

121801115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282141.

The product of its (nonzero) digits is 80, while the sum is 20.

The square root of 121801115 is about 11036.3542440427. The cubic root of 121801115 is about 495.6979102109.

Adding to 121801115 its reverse (511108121), we get a palindrome (632909236).

The spelling of 121801115 in words is "one hundred twenty-one million, eight hundred one thousand, one hundred fifteen".