11033247721 has 2 divisors, whose sum is σ = 11033247722. Its totient is φ = 11033247720.

The previous prime is 11033247689. The next prime is 11033247733. The reversal of 11033247721 is 12774233011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10596437721 + 436810000 = 102939^2 + 20900^2 .

It is an emirp because it is prime and its reverse (12774233011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11033247721 - 2⁵ = 11033247689 is a prime.

It is not a weakly prime, because it can be changed into another prime (11033247761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5516623860 + 5516623861.

It is an arithmetic number, because the mean of its divisors is an integer number (5516623861).

Almost surely, 2^11033247721 is an apocalyptic number.

It is an amenable number.

11033247721 is a deficient number, since it is larger than the sum of its proper divisors (1).

11033247721 is an equidigital number, since it uses as much as digits as its factorization.

11033247721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The spelling of 11033247721 in words is "eleven billion, thirty-three million, two hundred forty-seven thousand, seven hundred twenty-one".