11013312221 has 2 divisors, whose sum is σ = 11013312222. Its totient is φ = 11013312220.

The previous prime is 11013312199. The next prime is 11013312227. The reversal of 11013312221 is 12221331011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10998765625 + 14546596 = 104875^2 + 3814^2 .

It is an emirp because it is prime and its reverse (12221331011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11013312221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11013312221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11013312227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5506656110 + 5506656111.

It is an arithmetic number, because the mean of its divisors is an integer number (5506656111).

Almost surely, 2^11013312221 is an apocalyptic number.

It is an amenable number.

11013312221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11013312221 is an equidigital number, since it uses as much as digits as its factorization.

11013312221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11013312221 its reverse (12221331011), we get a palindrome (23234643232).

The spelling of 11013312221 in words is "eleven billion, thirteen million, three hundred twelve thousand, two hundred twenty-one".