11010011021981 has 2 divisors, whose sum is σ = 11010011021982. Its totient is φ = 11010011021980.

The previous prime is 11010011021929. The next prime is 11010011022097. The reversal of 11010011021981 is 18912011001011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8322411449881 + 2687599572100 = 2884859^2 + 1639390^2 .

It is a cyclic number.

It is not a de Polignac number, because 11010011021981 - 2¹⁴ = 11010011005597 is a prime.

It is a super-2 number, since 2×11010011021981² (a number of 27 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 11010011021981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11010011011981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505005510990 + 5505005510991.

It is an arithmetic number, because the mean of its divisors is an integer number (5505005510991).

Almost surely, 2^{11010011021981} is an apocalyptic number.

It is an amenable number.

11010011021981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11010011021981 is an equidigital number, since it uses as much as digits as its factorization.

11010011021981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 26.

Adding to 11010011021981 its reverse (18912011001011), we get a palindrome (29922022022992).

The spelling of 11010011021981 in words is "eleven trillion, ten billion, eleven million, twenty-one thousand, nine hundred eighty-one".