11028743981 has 2 divisors, whose sum is σ = 11028743982. Its totient is φ = 11028743980.

The previous prime is 11028743959. The next prime is 11028744011. The reversal of 11028743981 is 18934782011.

11028743981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10996877956 + 31866025 = 104866^2 + 5645^2 .

It is a cyclic number.

It is not a de Polignac number, because 11028743981 - 2¹⁸ = 11028481837 is a prime.

It is a super-2 number, since 2×11028743981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11028743951) 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, 5514371990 + 5514371991.

It is an arithmetic number, because the mean of its divisors is an integer number (5514371991).

Almost surely, 2^11028743981 is an apocalyptic number.

It is an amenable number.

11028743981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11028743981 is an equidigital number, since it uses as much as digits as its factorization.

11028743981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 44.

The spelling of 11028743981 in words is "eleven billion, twenty-eight million, seven hundred forty-three thousand, nine hundred eighty-one".