11020778281 has 2 divisors, whose sum is σ = 11020778282. Its totient is φ = 11020778280.

The previous prime is 11020778257. The next prime is 11020778291. The reversal of 11020778281 is 18287702011.

11020778281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8862339600 + 2158438681 = 94140^2 + 46459^2 .

It is an emirp because it is prime and its reverse (18287702011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11020778281 is a prime.

It is a super-2 number, since 2×11020778281² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11020778281.

It is not a weakly prime, because it can be changed into another prime (11020778291) 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 as a sum of consecutive naturals, namely, 5510389140 + 5510389141.

It is an arithmetic number, because the mean of its divisors is an integer number (5510389141).

Almost surely, 2^11020778281 is an apocalyptic number.

It is an amenable number.

11020778281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11020778281 is an equidigital number, since it uses as much as digits as its factorization.

11020778281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12544, while the sum is 37.

The spelling of 11020778281 in words is "eleven billion, twenty million, seven hundred seventy-eight thousand, two hundred eighty-one".