11011101111001 has 2 divisors, whose sum is σ = 11011101111002. Its totient is φ = 11011101111000.

The previous prime is 11011101110963. The next prime is 11011101111047. The reversal of 11011101111001 is 10011110111011.

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., 8980330758400 + 2030770352601 = 2996720^2 + 1425051^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011101111001 - 2³³ = 11002511176409 is a prime.

It is not a weakly prime, because it can be changed into another prime (11011101111091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505550555500 + 5505550555501.

It is an arithmetic number, because the mean of its divisors is an integer number (5505550555501).

Almost surely, 2^{11011101111001} is an apocalyptic number.

It is an amenable number.

11011101111001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011101111001 is an equidigital number, since it uses as much as digits as its factorization.

11011101111001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1, while the sum is 10.

Adding to 11011101111001 its reverse (10011110111011), we get a palindrome (21022211222012).

The spelling of 11011101111001 in words is "eleven trillion, eleven billion, one hundred one million, one hundred eleven thousand, one".