111112221111 has 32 divisors (see below), whose sum is σ = 153683308800. Its totient is φ = 71349186816.

The previous prime is 111112221109. The next prime is 111112221127. The reversal of 111112221111 is 111122211111.

It is not a de Polignac number, because 111112221111 - 2¹ = 111112221109 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112221811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24927595 + ... + 24932051.

It is an arithmetic number, because the mean of its divisors is an integer number (4802603400).

Almost surely, 2^111112221111 is an apocalyptic number.

111112221111 is a deficient number, since it is larger than the sum of its proper divisors (42571087689).

111112221111 is a wasteful number, since it uses less digits than its factorization.

111112221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703.

The product of its digits is 8, while the sum is 15.

Adding to 111112221111 its reverse (111122211111), we get a palindrome (222234432222).

The spelling of 111112221111 in words is "one hundred eleven billion, one hundred twelve million, two hundred twenty-one thousand, one hundred eleven".