11021203 has 4 divisors (see below), whose sum is σ = 11030328. Its totient is φ = 11012080.

The previous prime is 11021183. The next prime is 11021249. The reversal of 11021203 is 30212011.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 30212011 = 31 ⋅974581.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11021203 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 11021203.

It is not an unprimeable number, because it can be changed into a prime (11021293) 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, 2413 + ... + 5278.

It is an arithmetic number, because the mean of its divisors is an integer number (2757582).

Almost surely, 2^11021203 is an apocalyptic number.

11021203 is a deficient number, since it is larger than the sum of its proper divisors (9125).

11021203 is an equidigital number, since it uses as much as digits as its factorization.

11021203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9124.

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

The square root of 11021203 is about 3319.8197240212. The cubic root of 11021203 is about 222.5408114340.

Adding to 11021203 its reverse (30212011), we get a palindrome (41233214).

The spelling of 11021203 in words is "eleven million, twenty-one thousand, two hundred three".