111220111011 has 16 divisors (see below), whose sum is σ = 149869070208. Its totient is φ = 73362307200.

The previous prime is 111220111003. The next prime is 111220111031. The reversal of 111220111011 is 110111022111.

It is not a de Polignac number, because 111220111011 - 2³ = 111220111003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111220111031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287445 + ... + 552326.

It is an arithmetic number, because the mean of its divisors is an integer number (9366816888).

Almost surely, 2^111220111011 is an apocalyptic number.

111220111011 is a deficient number, since it is larger than the sum of its proper divisors (38648959197).

111220111011 is a wasteful number, since it uses less digits than its factorization.

111220111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840242.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111220111011 its reverse (110111022111), we get a palindrome (221331133122).

The spelling of 111220111011 in words is "one hundred eleven billion, two hundred twenty million, one hundred eleven thousand, eleven".