20121314105 has 4 divisors (see below), whose sum is σ = 24145576932. Its totient is φ = 16097051280.

The previous prime is 20121314099. The next prime is 20121314113. The reversal of 20121314105 is 50141312102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8599223824 + 11522090281 = 92732^2 + 107341^2 .

It is not a de Polignac number, because 20121314105 - 2⁶ = 20121314041 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2012131406 + ... + 2012131415.

It is an arithmetic number, because the mean of its divisors is an integer number (6036394233).

Almost surely, 2^20121314105 is an apocalyptic number.

It is an amenable number.

20121314105 is a deficient number, since it is larger than the sum of its proper divisors (4024262827).

20121314105 is an equidigital number, since it uses as much as digits as its factorization.

20121314105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4024262826.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 20121314105 its reverse (50141312102), we get a palindrome (70262626207).

The spelling of 20121314105 in words is "twenty billion, one hundred twenty-one million, three hundred fourteen thousand, one hundred five".