11211011101001 has 2 divisors, whose sum is σ = 11211011101002. Its totient is φ = 11211011101000.

The previous prime is 11211011100943. The next prime is 11211011101061. The reversal of 11211011101001 is 10010111011211.

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., 6483643690000 + 4727367411001 = 2546300^2 + 2174251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211011101001 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211011101061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605505550500 + 5605505550501.

It is an arithmetic number, because the mean of its divisors is an integer number (5605505550501).

Almost surely, 2^{11211011101001} is an apocalyptic number.

It is an amenable number.

11211011101001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211011101001 is an equidigital number, since it uses as much as digits as its factorization.

11211011101001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 11211011101001 its reverse (10010111011211), we get a palindrome (21221122112212).

The spelling of 11211011101001 in words is "eleven trillion, two hundred eleven billion, eleven million, one hundred one thousand, one".