10011010999981 has 2 divisors, whose sum is σ = 10011010999982. Its totient is φ = 10011010999980.

The previous prime is 10011010999973. The next prime is 10011011000033. The reversal of 10011010999981 is 18999901011001.

10011010999981 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., 7883409523081 + 2127601476900 = 2807741^2 + 1458630^2 .

It is an emirp because it is prime and its reverse (18999901011001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10011010999981 - 2³ = 10011010999973 is a prime.

It is a super-2 number, since 2×10011010999981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10011010999921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005505499990 + 5005505499991.

It is an arithmetic number, because the mean of its divisors is an integer number (5005505499991).

Almost surely, 2^{10011010999981} is an apocalyptic number.

It is an amenable number.

10011010999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10011010999981 is an equidigital number, since it uses as much as digits as its factorization.

10011010999981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 49.

The spelling of 10011010999981 in words is "ten trillion, eleven billion, ten million, nine hundred ninety-nine thousand, nine hundred eighty-one".