11111021110111 has 16 divisors (see below), whose sum is σ = 12201489797728. Its totient is φ = 10055329891200.

The previous prime is 11111021110099. The next prime is 11111021110157. The reversal of 11111021110111 is 11101112011111.

It is a cyclic number.

It is not a de Polignac number, because 11111021110111 - 2¹⁹ = 11111020585823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111021110091 and 11111021110100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111021110171) 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, 22576380 + ... + 23063281.

It is an arithmetic number, because the mean of its divisors is an integer number (762593112358).

Almost surely, 2^{11111021110111} is an apocalyptic number.

11111021110111 is a deficient number, since it is larger than the sum of its proper divisors (1090468687617).

11111021110111 is a wasteful number, since it uses less digits than its factorization.

11111021110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45640042.

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

Adding to 11111021110111 its reverse (11101112011111), we get a palindrome (22212133121222).

The spelling of 11111021110111 in words is "eleven trillion, one hundred eleven billion, twenty-one million, one hundred ten thousand, one hundred eleven".