11111101222 has 16 divisors (see below), whose sum is σ = 18090035712. Its totient is φ = 5087819520.

The previous prime is 11111101217. The next prime is 11111101241. The reversal of 11111101222 is 22210111111.

It is a happy number.

11111101222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1679179 + ... + 1685782.

It is an arithmetic number, because the mean of its divisors is an integer number (1130627232).

Almost surely, 2^11111101222 is an apocalyptic number.

11111101222 is a deficient number, since it is larger than the sum of its proper divisors (6978934490).

11111101222 is a wasteful number, since it uses less digits than its factorization.

11111101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3365103.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11111101222 its reverse (22210111111), we get a palindrome (33321212333).

The spelling of 11111101222 in words is "eleven billion, one hundred eleven million, one hundred one thousand, two hundred twenty-two".