100201121 has 4 divisors (see below), whose sum is σ = 100400832. Its totient is φ = 100001412.

The previous prime is 100201109. The next prime is 100201139. The reversal of 100201121 is 121102001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100201121 - 2¹⁸ = 99938977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100201099 and 100201108.

It is not an unprimeable number, because it can be changed into a prime (100201141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99101 + ... + 100106.

It is an arithmetic number, because the mean of its divisors is an integer number (25100208).

Almost surely, 2^100201121 is an apocalyptic number.

It is an amenable number.

100201121 is a deficient number, since it is larger than the sum of its proper divisors (199711).

100201121 is an equidigital number, since it uses as much as digits as its factorization.

100201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199710.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 100201121 is about 10010.0509988711. The cubic root of 100201121 is about 464.4698486448.

Adding to 100201121 its reverse (121102001), we get a palindrome (221303122).

The spelling of 100201121 in words is "one hundred million, two hundred one thousand, one hundred twenty-one".