20010011010181 has 2 divisors, whose sum is σ = 20010011010182. Its totient is φ = 20010011010180.

The previous prime is 20010011010133. The next prime is 20010011010229. The reversal of 20010011010181 is 18101011001002.

It is a balanced prime because it is at equal distance from previous prime (20010011010133) and next prime (20010011010229).

It can be written as a sum of positive squares in only one way, i.e., 19369065060900 + 640945949281 = 4401030^2 + 800591^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010011010181 - 2¹¹ = 20010011008133 is a prime.

It is a super-2 number, since 2×20010011010181² (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 (20010018010181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005005505090 + 10005005505091.

It is an arithmetic number, because the mean of its divisors is an integer number (10005005505091).

Almost surely, 2^{20010011010181} is an apocalyptic number.

It is an amenable number.

20010011010181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010011010181 is an equidigital number, since it uses as much as digits as its factorization.

20010011010181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 20010011010181 its reverse (18101011001002), we get a palindrome (38111022011183).

The spelling of 20010011010181 in words is "twenty trillion, ten billion, eleven million, ten thousand, one hundred eighty-one".