100858121 has 16 divisors (see below), whose sum is σ = 126672000. Its totient is φ = 79796304.

The previous prime is 100858117. The next prime is 100858129. The reversal of 100858121 is 121858001.

It is not a de Polignac number, because 100858121 - 2² = 100858117 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100858129) by changing a digit.

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, 6851 + ... + 15768.

It is an arithmetic number, because the mean of its divisors is an integer number (7917000).

Almost surely, 2^100858121 is an apocalyptic number.

It is an amenable number.

100858121 is a deficient number, since it is larger than the sum of its proper divisors (25813879).

100858121 is an equidigital number, since it uses as much as digits as its factorization.

100858121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22653 (or 22639 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 100858121 is about 10042.8143963732. The cubic root of 100858121 is about 465.4827852755.

The spelling of 100858121 in words is "one hundred million, eight hundred fifty-eight thousand, one hundred twenty-one".