11112212111 has 144 divisors (see below), whose sum is σ = 16812085248. Its totient is φ = 7204982400.

The previous prime is 11112212101. The next prime is 11112212123. The reversal of 11112212111 is 11121221111.

It is not a de Polignac number, because 11112212111 - 2⁶ = 11112212047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112212101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 58179026 + ... + 58179216.

It is an arithmetic number, because the mean of its divisors is an integer number (116750592).

Almost surely, 2^11112212111 is an apocalyptic number.

11112212111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11112212111 is a deficient number, since it is larger than the sum of its proper divisors (5699873137).

11112212111 is a wasteful number, since it uses less digits than its factorization.

11112212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 264 counting only the distinct ones).

The product of its digits is 8, while the sum is 14.

Adding to 11112212111 its reverse (11121221111), we get a palindrome (22233433222).

The spelling of 11112212111 in words is "eleven billion, one hundred twelve million, two hundred twelve thousand, one hundred eleven".