10101001010081 has 2 divisors, whose sum is σ = 10101001010082. Its totient is φ = 10101001010080.

The previous prime is 10101001010077. The next prime is 10101001010101. The reversal of 10101001010081 is 18001010010101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7955874619456 + 2145126390625 = 2820616^2 + 1464625^2 .

It is a cyclic number.

It is not a de Polignac number, because 10101001010081 - 2² = 10101001010077 is a prime.

It is a super-2 number, since 2×10101001010081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10101001010381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050500505040 + 5050500505041.

It is an arithmetic number, because the mean of its divisors is an integer number (5050500505041).

Almost surely, 2^{10101001010081} is an apocalyptic number.

It is an amenable number.

10101001010081 is a deficient number, since it is larger than the sum of its proper divisors (1).

10101001010081 is an equidigital number, since it uses as much as digits as its factorization.

10101001010081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 10101001010081 its reverse (18001010010101), we get a palindrome (28102011020182).

The spelling of 10101001010081 in words is "ten trillion, one hundred one billion, one million, ten thousand, eighty-one".