11122222111 has 96 divisors (see below), whose sum is σ = 15516031104. Its totient is φ = 7755264000.

The previous prime is 11122222099. The next prime is 11122222157.

11122222111 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 11122222111 - 2¹⁵ = 11122189343 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122226111) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 81184035 + ... + 81184171.

It is an arithmetic number, because the mean of its divisors is an integer number (161625324).

Almost surely, 2^11122222111 is an apocalyptic number.

11122222111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11122222111 is a deficient number, since it is larger than the sum of its proper divisors (4393808993).

11122222111 is a wasteful number, since it uses less digits than its factorization.

11122222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 342 counting only the distinct ones).

The product of its digits is 32, while the sum is 16.

It can be divided in two parts, 111 and 22222111, that added together give a palindrome (22222222).

The spelling of 11122222111 in words is "eleven billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred eleven".