2121103 has 4 divisors (see below), whose sum is σ = 2232760. Its totient is φ = 2009448.

The previous prime is 2121043. The next prime is 2121121. The reversal of 2121103 is 3011212.

2121103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2121103 - 2¹⁷ = 1990031 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55800 + ... + 55837.

It is an arithmetic number, because the mean of its divisors is an integer number (558190).

2^2121103 is an apocalyptic number.

2121103 is a deficient number, since it is larger than the sum of its proper divisors (111657).

2121103 is a wasteful number, since it uses less digits than its factorization.

2121103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111656.

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

The square root of 2121103 is about 1456.4007003569. The cubic root of 2121103 is about 128.4854409765.

Adding to 2121103 its reverse (3011212), we get a palindrome (5132315).

The spelling of 2121103 in words is "two million, one hundred twenty-one thousand, one hundred three".