11111001111211 has 16 divisors (see below), whose sum is σ = 11732764152960. Its totient is φ = 10492952336640.

The previous prime is 11111001111209. The next prime is 11111001111241. The reversal of 11111001111211 is 11211110011111.

It is a cyclic number.

It is not a de Polignac number, because 11111001111211 - 2¹ = 11111001111209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111001111191 and 11111001111200.

It is not an unprimeable number, because it can be changed into a prime (11111001111241) 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, 23613916 + ... + 24079846.

It is an arithmetic number, because the mean of its divisors is an integer number (733297759560).

Almost surely, 2^{11111001111211} is an apocalyptic number.

11111001111211 is a deficient number, since it is larger than the sum of its proper divisors (621763041749).

11111001111211 is a wasteful number, since it uses less digits than its factorization.

11111001111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469914.

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 11111001111211 its reverse (11211110011111), we get a palindrome (22322111122322).

The spelling of 11111001111211 in words is "eleven trillion, one hundred eleven billion, one million, one hundred eleven thousand, two hundred eleven".