11101111021111 has 4 divisors (see below), whose sum is σ = 11337304872672. Its totient is φ = 10864917169552.

The previous prime is 11101111021087. The next prime is 11101111021129. The reversal of 11101111021111 is 11112011110111.

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

It is not a de Polignac number, because 11101111021111 - 2³³ = 11092521086519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11101111021091 and 11101111021100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101111021141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118096925710 + ... + 118096925803.

It is an arithmetic number, because the mean of its divisors is an integer number (2834326218168).

Almost surely, 2^{11101111021111} is an apocalyptic number.

11101111021111 is a deficient number, since it is larger than the sum of its proper divisors (236193851561).

11101111021111 is an equidigital number, since it uses as much as digits as its factorization.

11101111021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236193851560.

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

Adding to 11101111021111 its reverse (11112011110111), we get a palindrome (22213122131222).

The spelling of 11101111021111 in words is "eleven trillion, one hundred one billion, one hundred eleven million, twenty-one thousand, one hundred eleven".