100312105 has 4 divisors (see below), whose sum is σ = 120374532. Its totient is φ = 80249680.

The previous prime is 100312103. The next prime is 100312109. The reversal of 100312105 is 501213001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501213001 = 367 ⋅1365703.

It can be written as a sum of positive squares in 2 ways, for example, as 62267881 + 38044224 = 7891^2 + 6168^2 .

It is not a de Polignac number, because 100312105 - 2¹ = 100312103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100312103) 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, 10031206 + ... + 10031215.

It is an arithmetic number, because the mean of its divisors is an integer number (30093633).

Almost surely, 2^100312105 is an apocalyptic number.

It is an amenable number.

100312105 is a deficient number, since it is larger than the sum of its proper divisors (20062427).

100312105 is an equidigital number, since it uses as much as digits as its factorization.

100312105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20062426.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 100312105 is about 10015.5930927729. The cubic root of 100312105 is about 464.6412695526.

Adding to 100312105 its reverse (501213001), we get a palindrome (601525106).

The spelling of 100312105 in words is "one hundred million, three hundred twelve thousand, one hundred five".