121866901 has 16 divisors (see below), whose sum is σ = 134265600. Its totient is φ = 109931328.

The previous prime is 121866887. The next prime is 121866917. The reversal of 121866901 is 109668121.

It is not a de Polignac number, because 121866901 - 2⁹ = 121866389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121866971) 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 15 ways as a sum of consecutive naturals, for example, 109335 + ... + 110443.

It is an arithmetic number, because the mean of its divisors is an integer number (8391600).

Almost surely, 2^121866901 is an apocalyptic number.

It is an amenable number.

121866901 is a deficient number, since it is larger than the sum of its proper divisors (12398699).

121866901 is a wasteful number, since it uses less digits than its factorization.

121866901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 121866901 is about 11039.3342643476. The cubic root of 121866901 is about 495.7871379477.

The spelling of 121866901 in words is "one hundred twenty-one million, eight hundred sixty-six thousand, nine hundred one".