121807885 has 16 divisors (see below), whose sum is σ = 156652416. Its totient is φ = 90687168.

The previous prime is 121807877. The next prime is 121807921. The reversal of 121807885 is 588708121.

It is a cyclic number.

It is not a de Polignac number, because 121807885 - 2³ = 121807877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10059 + ... + 18568.

It is an arithmetic number, because the mean of its divisors is an integer number (9790776).

Almost surely, 2^121807885 is an apocalyptic number.

It is an amenable number.

121807885 is a deficient number, since it is larger than the sum of its proper divisors (34844531).

121807885 is a wasteful number, since it uses less digits than its factorization.

121807885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28692.

The product of its (nonzero) digits is 35840, while the sum is 40.

The square root of 121807885 is about 11036.6609533862. The cubic root of 121807885 is about 495.7070940695.

The spelling of 121807885 in words is "one hundred twenty-one million, eight hundred seven thousand, eight hundred eighty-five".