2100012103 has 4 divisors (see below), whose sum is σ = 2400013840. Its totient is φ = 1800010368.

The previous prime is 2100012017. The next prime is 2100012121. The reversal of 2100012103 is 3012100012.

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

It is a cyclic number.

It is not a de Polignac number, because 2100012103 - 2⁹ = 2100011591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100012103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100012403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150000858 + ... + 150000871.

It is an arithmetic number, because the mean of its divisors is an integer number (600003460).

Almost surely, 2^2100012103 is an apocalyptic number.

2100012103 is a deficient number, since it is larger than the sum of its proper divisors (300001737).

2100012103 is an equidigital number, since it uses as much as digits as its factorization.

2100012103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300001736.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2100012103 is about 45825.8890039244. The cubic root of 2100012103 is about 1280.5816251176.

Adding to 2100012103 its reverse (3012100012), we get a palindrome (5112112115).

The spelling of 2100012103 in words is "two billion, one hundred million, twelve thousand, one hundred three".