11011211122001 has 4 divisors (see below), whose sum is σ = 11124728762532. Its totient is φ = 10897693481472.

The previous prime is 11011211121919. The next prime is 11011211122073. The reversal of 11011211122001 is 10022111211011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6889580289601 + 4121630832400 = 2624801^2 + 2030180^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011211122001 - 2³⁴ = 10994031252817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11011211122091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56758820120 + ... + 56758820313.

It is an arithmetic number, because the mean of its divisors is an integer number (2781182190633).

Almost surely, 2^{11011211122001} is an apocalyptic number.

It is an amenable number.

11011211122001 is a deficient number, since it is larger than the sum of its proper divisors (113517640531).

11011211122001 is an equidigital number, since it uses as much as digits as its factorization.

11011211122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113517640530.

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

Adding to 11011211122001 its reverse (10022111211011), we get a palindrome (21033322333012).

The spelling of 11011211122001 in words is "eleven trillion, eleven billion, two hundred eleven million, one hundred twenty-two thousand, one".