101011100001001 has 2 divisors, whose sum is σ = 101011100001002. Its totient is φ = 101011100001000.

The previous prime is 101011100000999. The next prime is 101011100001013. The reversal of 101011100001001 is 100100001110101.

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., 79120117712601 + 21890982288400 = 8894949^2 + 4678780^2 .

It is an emirp because it is prime and its reverse (100100001110101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101011100001001 - 2¹ = 101011100000999 is a prime.

Together with 101011100000999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (101011100091001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50505550000500 + 50505550000501.

It is an arithmetic number, because the mean of its divisors is an integer number (50505550000501).

Almost surely, 2^{101011100001001} is an apocalyptic number.

It is an amenable number.

101011100001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

101011100001001 is an equidigital number, since it uses as much as digits as its factorization.

101011100001001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1, while the sum is 7.

Adding to 101011100001001 its reverse (100100001110101), we get a palindrome (201111101111102).

The spelling of 101011100001001 in words is "one hundred one trillion, eleven billion, one hundred million, one thousand, one".