12021103 has 4 divisors (see below), whose sum is σ = 12088440. Its totient is φ = 11953768.

The previous prime is 12021071. The next prime is 12021131. The reversal of 12021103 is 30112021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30112021 = 211 ⋅142711.

It is a cyclic number.

It is not a de Polignac number, because 12021103 - 2⁵ = 12021071 is a prime.

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 12021103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021403) 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, 33400 + ... + 33757.

It is an arithmetic number, because the mean of its divisors is an integer number (3022110).

Almost surely, 2^12021103 is an apocalyptic number.

12021103 is a deficient number, since it is larger than the sum of its proper divisors (67337).

12021103 is an equidigital number, since it uses as much as digits as its factorization.

12021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67336.

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

The square root of 12021103 is about 3467.1462328549. The cubic root of 12021103 is about 229.0769749431.

Adding to 12021103 its reverse (30112021), we get a palindrome (42133124).

The spelling of 12021103 in words is "twelve million, twenty-one thousand, one hundred three".