11111111212222 has 24 divisors (see below), whose sum is σ = 19404927974160. Its totient is φ = 4757686950240.

The previous prime is 11111111212217. The next prime is 11111111212237. The reversal of 11111111212222 is 22221211111111.

11111111212222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 11111111212222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50101354 + ... + 50322637.

It is an arithmetic number, because the mean of its divisors is an integer number (808538665590).

Almost surely, 2^{11111111212222} is an apocalyptic number.

11111111212222 is a deficient number, since it is larger than the sum of its proper divisors (8293816761938).

11111111212222 is a wasteful number, since it uses less digits than its factorization.

11111111212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100425136 (or 100425129 counting only the distinct ones).

The product of its digits is 32, while the sum is 19.

Adding to 11111111212222 its reverse (22221211111111), we get a palindrome (33332322323333).

The spelling of 11111111212222 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty-two".