11144020981 has 2 divisors, whose sum is σ = 11144020982. Its totient is φ = 11144020980.

The previous prime is 11144020969. The next prime is 11144021039. The reversal of 11144020981 is 18902044111.

11144020981 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., 10876404100 + 267616881 = 104290^2 + 16359^2 .

It is a cyclic number.

It is not a de Polignac number, because 11144020981 - 2²⁹ = 10607150069 is a prime.

It is a super-2 number, since 2×11144020981² (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 (11148020981) 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, 5572010490 + 5572010491.

It is an arithmetic number, because the mean of its divisors is an integer number (5572010491).

Almost surely, 2^11144020981 is an apocalyptic number.

It is an amenable number.

11144020981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11144020981 is an equidigital number, since it uses as much as digits as its factorization.

11144020981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 11144020981 in words is "eleven billion, one hundred forty-four million, twenty thousand, nine hundred eighty-one".