111122221111 has 36 divisors (see below), whose sum is σ = 125037133704. Its totient is φ = 97929792000.

The previous prime is 111122221109. The next prime is 111122221121.

111122221111 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 111122221111 - 2¹ = 111122221109 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 (111122221121) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 811111035 + ... + 811111171.

It is an arithmetic number, because the mean of its divisors is an integer number (3473253714).

Almost surely, 2^111122221111 is an apocalyptic number.

111122221111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111122221111 is a deficient number, since it is larger than the sum of its proper divisors (13914912593).

111122221111 is an equidigital number, since it uses as much as digits as its factorization.

111122221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532 (or 322 counting only the distinct ones).

The product of its digits is 16, while the sum is 16.

It can be divided in two parts, 111122 and 221111, that added together give a palindrome (332233).

The spelling of 111122221111 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred eleven".