11111222105 has 16 divisors (see below), whose sum is σ = 13426482240. Its totient is φ = 8827169472.

The previous prime is 11111222071. The next prime is 11111222119. The reversal of 11111222105 is 50122211111.

It is a cyclic number.

It is not a de Polignac number, because 11111222105 - 2¹⁶ = 11111156569 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438266 + ... + 462924.

It is an arithmetic number, because the mean of its divisors is an integer number (839155140).

Almost surely, 2^11111222105 is an apocalyptic number.

It is an amenable number.

11111222105 is a deficient number, since it is larger than the sum of its proper divisors (2315260135).

11111222105 is a wasteful number, since it uses less digits than its factorization.

11111222105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25288.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 11111222105 its reverse (50122211111), we get a palindrome (61233433216).

The spelling of 11111222105 in words is "eleven billion, one hundred eleven million, two hundred twenty-two thousand, one hundred five".