11203313221 has 2 divisors, whose sum is σ = 11203313222. Its totient is φ = 11203313220.

The previous prime is 11203313203. The next prime is 11203313291. The reversal of 11203313221 is 12231330211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7227380196 + 3975933025 = 85014^2 + 63055^2 .

It is an emirp because it is prime and its reverse (12231330211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11203313221 - 2²⁹ = 10666442309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11203313291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5601656610 + 5601656611.

It is an arithmetic number, because the mean of its divisors is an integer number (5601656611).

Almost surely, 2^11203313221 is an apocalyptic number.

It is an amenable number.

11203313221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11203313221 is an equidigital number, since it uses as much as digits as its factorization.

11203313221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11203313221 its reverse (12231330211), we get a palindrome (23434643432).

The spelling of 11203313221 in words is "eleven billion, two hundred three million, three hundred thirteen thousand, two hundred twenty-one".