11001111200001 has 64 divisors (see below), whose sum is σ = 18170836992000. Its totient is φ = 6531437203200.

The previous prime is 11001111199987. The next prime is 11001111200039. The reversal of 11001111200001 is 10000211110011.

It is not a de Polignac number, because 11001111200001 - 2¹⁰ = 11001111198977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (11001111200041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12827520 + ... + 13658238.

It is an arithmetic number, because the mean of its divisors is an integer number (283919328000).

Almost surely, 2^{11001111200001} is an apocalyptic number.

It is an amenable number.

11001111200001 is a deficient number, since it is larger than the sum of its proper divisors (7169725791999).

11001111200001 is a wasteful number, since it uses less digits than its factorization.

11001111200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832071 (or 832065 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11001111200001 its reverse (10000211110011), we get a palindrome (21001322310012).

The spelling of 11001111200001 in words is "eleven trillion, one billion, one hundred eleven million, two hundred thousand, one".