101312305 has 4 divisors (see below), whose sum is σ = 121574772. Its totient is φ = 81049840.

The previous prime is 101312291. The next prime is 101312317. The reversal of 101312305 is 503213101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503213101 = 5653 ⋅89017.

It can be written as a sum of positive squares in 2 ways, for example, as 23590449 + 77721856 = 4857^2 + 8816^2 .

It is not a de Polignac number, because 101312305 - 2⁵ = 101312273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10131226 + ... + 10131235.

It is an arithmetic number, because the mean of its divisors is an integer number (30393693).

Almost surely, 2^101312305 is an apocalyptic number.

It is an amenable number.

101312305 is a deficient number, since it is larger than the sum of its proper divisors (20262467).

101312305 is an equidigital number, since it uses as much as digits as its factorization.

101312305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20262466.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 101312305 is about 10065.4013829554. The cubic root of 101312305 is about 466.1804593126.

Adding to 101312305 its reverse (503213101), we get a palindrome (604525406).

The spelling of 101312305 in words is "one hundred one million, three hundred twelve thousand, three hundred five".