111220131111 has 16 divisors (see below), whose sum is σ = 151771868160. Its totient is φ = 72408248640.

The previous prime is 111220131107. The next prime is 111220131133. The reversal of 111220131111 is 111131022111.

It is not a de Polignac number, because 111220131111 - 2² = 111220131107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220133111) 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 15 ways as a sum of consecutive naturals, for example, 599331 + ... + 762651.

It is an arithmetic number, because the mean of its divisors is an integer number (9485741760).

Almost surely, 2^111220131111 is an apocalyptic number.

111220131111 is a deficient number, since it is larger than the sum of its proper divisors (40551737049).

111220131111 is a wasteful number, since it uses less digits than its factorization.

111220131111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168646.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 111220131111 its reverse (111131022111), we get a palindrome (222351153222).

The spelling of 111220131111 in words is "one hundred eleven billion, two hundred twenty million, one hundred thirty-one thousand, one hundred eleven".