111311220111 has 32 divisors (see below), whose sum is σ = 192278499840. Its totient is φ = 55623417984.

The previous prime is 111311220109. The next prime is 111311220121. The reversal of 111311220111 is 111022113111.

It is not a de Polignac number, because 111311220111 - 2¹ = 111311220109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111311220121) 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, 10724640 + ... + 10735013.

It is an arithmetic number, because the mean of its divisors is an integer number (6008703120).

Almost surely, 2^111311220111 is an apocalyptic number.

111311220111 is a deficient number, since it is larger than the sum of its proper divisors (80967279729).

111311220111 is a wasteful number, since it uses less digits than its factorization.

111311220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21459695.

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

Adding to 111311220111 its reverse (111022113111), we get a palindrome (222333333222).

The spelling of 111311220111 in words is "one hundred eleven billion, three hundred eleven million, two hundred twenty thousand, one hundred eleven".