11111212222 has 16 divisors (see below), whose sum is σ = 18246241152. Its totient is φ = 5032701720.

The previous prime is 11111212213. The next prime is 11111212247. The reversal of 11111212222 is 22221211111.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 11111212196 and 11111212205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 886098 + ... + 898549.

It is an arithmetic number, because the mean of its divisors is an integer number (1140390072).

Almost surely, 2^11111212222 is an apocalyptic number.

11111212222 is a deficient number, since it is larger than the sum of its proper divisors (7135028930).

11111212222 is a wasteful number, since it uses less digits than its factorization.

11111212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784943.

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

Adding to 11111212222 its reverse (22221211111), we get a palindrome (33332423333).

The spelling of 11111212222 in words is "eleven billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty-two".