111220100111 has 4 divisors (see below), whose sum is σ = 111364730400. Its totient is φ = 111075469824.

The previous prime is 111220100051. The next prime is 111220100113. The reversal of 111220100111 is 111001022111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111220100111 - 2¹⁴ = 111220083727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111220100092 and 111220100101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220100113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72313991 + ... + 72315528.

It is an arithmetic number, because the mean of its divisors is an integer number (27841182600).

Almost surely, 2^111220100111 is an apocalyptic number.

111220100111 is a deficient number, since it is larger than the sum of its proper divisors (144630289).

111220100111 is an equidigital number, since it uses as much as digits as its factorization.

111220100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144630288.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111220100111 its reverse (111001022111), we get a palindrome (222221122222).

The spelling of 111220100111 in words is "one hundred eleven billion, two hundred twenty million, one hundred thousand, one hundred eleven".