11011111220001 has 16 divisors (see below), whose sum is σ = 15359189489280. Its totient is φ = 7003527822720.

The previous prime is 11011111219973. The next prime is 11011111220003. The reversal of 11011111220001 is 10002211111011.

11011111220001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11011111220001 - 2³⁹ = 10461355406113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11011111220003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205090540 + ... + 205144221.

It is an arithmetic number, because the mean of its divisors is an integer number (959949343080).

Almost surely, 2^{11011111220001} is an apocalyptic number.

It is an amenable number.

11011111220001 is a deficient number, since it is larger than the sum of its proper divisors (4348078269279).

11011111220001 is a wasteful number, since it uses less digits than its factorization.

11011111220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410235176.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11011111220001 its reverse (10002211111011), we get a palindrome (21013322331012).

The spelling of 11011111220001 in words is "eleven trillion, eleven billion, one hundred eleven million, two hundred twenty thousand, one".