100200121 has 16 divisors (see below), whose sum is σ = 119808000. Its totient is φ = 81935568.

The previous prime is 100200119. The next prime is 100200161. The reversal of 100200121 is 121002001.

It is not a de Polignac number, because 100200121 - 2¹ = 100200119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100200161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95920 + ... + 96958.

It is an arithmetic number, because the mean of its divisors is an integer number (7488000).

Almost surely, 2^100200121 is an apocalyptic number.

It is an amenable number.

100200121 is a deficient number, since it is larger than the sum of its proper divisors (19607879).

100200121 is a wasteful number, since it uses less digits than its factorization.

100200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 100200121 is about 10010.0010489510. The cubic root of 100200121 is about 464.4683035144.

Adding to 100200121 its reverse (121002001), we get a palindrome (221202122).

The spelling of 100200121 in words is "one hundred million, two hundred thousand, one hundred twenty-one".