11303021221 has 4 divisors (see below), whose sum is σ = 11345998752. Its totient is φ = 11260043692.

The previous prime is 11303021189. The next prime is 11303021263. The reversal of 11303021221 is 12212030311.

11303021221 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11303021221 - 2⁵ = 11303021189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11303021195 and 11303021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11303021021) 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, 21488371 + ... + 21488896.

It is an arithmetic number, because the mean of its divisors is an integer number (2836499688).

Almost surely, 2^11303021221 is an apocalyptic number.

It is an amenable number.

11303021221 is a deficient number, since it is larger than the sum of its proper divisors (42977531).

11303021221 is an equidigital number, since it uses as much as digits as its factorization.

11303021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42977530.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11303021221 its reverse (12212030311), we get a palindrome (23515051532).

The spelling of 11303021221 in words is "eleven billion, three hundred three million, twenty-one thousand, two hundred twenty-one".