11103233021 has 4 divisors (see below), whose sum is σ = 11130380700. Its totient is φ = 11076085344.

The previous prime is 11103232999. The next prime is 11103233077. The reversal of 11103233021 is 12033230111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10033027225 + 1070205796 = 100165^2 + 32714^2 .

It is a cyclic number.

It is not a de Polignac number, because 11103233021 - 2¹⁸ = 11102970877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11103233221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13573226 + ... + 13574043.

It is an arithmetic number, because the mean of its divisors is an integer number (2782595175).

Almost surely, 2^11103233021 is an apocalyptic number.

It is an amenable number.

11103233021 is a deficient number, since it is larger than the sum of its proper divisors (27147679).

11103233021 is an equidigital number, since it uses as much as digits as its factorization.

11103233021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27147678.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 11103233021 its reverse (12033230111), we get a palindrome (23136463132).

The spelling of 11103233021 in words is "eleven billion, one hundred three million, two hundred thirty-three thousand, twenty-one".