11010605981 has 2 divisors, whose sum is σ = 11010605982. Its totient is φ = 11010605980.

The previous prime is 11010605939. The next prime is 11010606017. The reversal of 11010605981 is 18950601011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6711705625 + 4298900356 = 81925^2 + 65566^2 .

It is a cyclic number.

It is not a de Polignac number, because 11010605981 - 2¹⁸ = 11010343837 is a prime.

It is a super-2 number, since 2×11010605981² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11010608981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505302990 + 5505302991.

It is an arithmetic number, because the mean of its divisors is an integer number (5505302991).

Almost surely, 2^11010605981 is an apocalyptic number.

It is an amenable number.

11010605981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11010605981 is an equidigital number, since it uses as much as digits as its factorization.

11010605981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 32.

The spelling of 11010605981 in words is "eleven billion, ten million, six hundred five thousand, nine hundred eighty-one".