11112222221111 has 64 divisors (see below), whose sum is σ = 12728278628352. Its totient is φ = 9613002240000.

The previous prime is 11112222221053. The next prime is 11112222221117.

It is a happy number.

11112222221111 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 11112222221111 - 2⁶ = 11112222221047 is a prime.

It is a Duffinian number.

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 (11112222221117) 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, 1222327676 + ... + 1222336766.

It is an arithmetic number, because the mean of its divisors is an integer number (198879353568).

Almost surely, 2^{11112222221111} is an apocalyptic number.

11112222221111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11112222221111 is a deficient number, since it is larger than the sum of its proper divisors (1616056407241).

11112222221111 is a wasteful number, since it uses less digits than its factorization.

11112222221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9624.

The product of its digits is 64, while the sum is 20.

It can be divided in two parts, 1111222 and 2221111, that added together give a palindrome (3332333).

The spelling of 11112222221111 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred eleven".