100440121 has 8 divisors (see below), whose sum is σ = 101600840. Its totient is φ = 99283968.

The previous prime is 100440113. The next prime is 100440133. The reversal of 100440121 is 121044001.

It can be written as a sum of positive squares in 4 ways, for example, as 40144896 + 60295225 = 6336^2 + 7765^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100440121 - 2³ = 100440113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100440161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62095 + ... + 63691.

It is an arithmetic number, because the mean of its divisors is an integer number (12700105).

Almost surely, 2^100440121 is an apocalyptic number.

It is an amenable number.

100440121 is a deficient number, since it is larger than the sum of its proper divisors (1160719).

100440121 is a wasteful number, since it uses less digits than its factorization.

100440121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 100440121 is about 10021.9818898260. The cubic root of 100440121 is about 464.8388403633.

Adding to 100440121 its reverse (121044001), we get a palindrome (221484122).

The spelling of 100440121 in words is "one hundred million, four hundred forty thousand, one hundred twenty-one".