2121300103 has 16 divisors (see below), whose sum is σ = 2420966016. Its totient is φ = 1841333760.

The previous prime is 2121300089. The next prime is 2121300119. The reversal of 2121300103 is 3010031212.

It is a cyclic number.

It is not a de Polignac number, because 2121300103 - 2¹⁷ = 2121169031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121300133) 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 15 ways as a sum of consecutive naturals, for example, 299938 + ... + 306928.

It is an arithmetic number, because the mean of its divisors is an integer number (151310376).

Almost surely, 2^2121300103 is an apocalyptic number.

2121300103 is a deficient number, since it is larger than the sum of its proper divisors (299665913).

2121300103 is a wasteful number, since it uses less digits than its factorization.

2121300103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8394.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2121300103 is about 46057.5737854264. The cubic root of 2121300103 is about 1284.8942067970.

Adding to 2121300103 its reverse (3010031212), we get a palindrome (5131331315).

The spelling of 2121300103 in words is "two billion, one hundred twenty-one million, three hundred thousand, one hundred three".