121820875 has 32 divisors (see below), whose sum is σ = 174620160. Its totient is φ = 83916000.

The previous prime is 121820869. The next prime is 121820927. The reversal of 121820875 is 578028121.

It is not a de Polignac number, because 121820875 - 2⁷ = 121820747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121820875.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23794 + ... + 28456.

It is an arithmetic number, because the mean of its divisors is an integer number (5456880).

Almost surely, 2^121820875 is an apocalyptic number.

121820875 is a deficient number, since it is larger than the sum of its proper divisors (52799285).

121820875 is a wasteful number, since it uses less digits than its factorization.

121820875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708 (or 4698 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 121820875 is about 11037.2494309044. The cubic root of 121820875 is about 495.7247147303.

Adding to 121820875 its reverse (578028121), we get a palindrome (699848996).

The spelling of 121820875 in words is "one hundred twenty-one million, eight hundred twenty thousand, eight hundred seventy-five".