101001010001081 has 2 divisors, whose sum is σ = 101001010001082. Its totient is φ = 101001010001080.

The previous prime is 101001010001071. The next prime is 101001010001149. The reversal of 101001010001081 is 180100010100101.

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., 73357768957225 + 27643241043856 = 8564915^2 + 5257684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101001010001081 is a prime.

It is a super-2 number, since 2×101001010001081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101001010001011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50500505000540 + 50500505000541.

It is an arithmetic number, because the mean of its divisors is an integer number (50500505000541).

Almost surely, 2^{101001010001081} is an apocalyptic number.

It is an amenable number.

101001010001081 is a deficient number, since it is larger than the sum of its proper divisors (1).

101001010001081 is an equidigital number, since it uses as much as digits as its factorization.

101001010001081 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 101001010001081 its reverse (180100010100101), we get a palindrome (281101020101182).

The spelling of 101001010001081 in words is "one hundred one trillion, one billion, ten million, one thousand, eighty-one".