111220011011 has 6 divisors (see below), whose sum is σ = 113636745060. Its totient is φ = 108853625636.

The previous prime is 111220010987. The next prime is 111220011017. The reversal of 111220011011 is 110110022111.

It is not a de Polignac number, because 111220011011 - 2¹⁰ = 111220009987 is a prime.

It is a super-2 number, since 2×111220011011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111220010983 and 111220011001.

It is not an unprimeable number, because it can be changed into a prime (111220011017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25172081 + ... + 25176498.

It is an arithmetic number, because the mean of its divisors is an integer number (18939457510).

Almost surely, 2^111220011011 is an apocalyptic number.

111220011011 is a deficient number, since it is larger than the sum of its proper divisors (2416734049).

111220011011 is an frugal number, since it uses more digits than its factorization.

111220011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50348673 (or 50348626 counting only the distinct ones).

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

Adding to 111220011011 its reverse (110110022111), we get a palindrome (221330033122).

It can be divided in two parts, 1112200 and 11011, that added together give a palindrome (1123211).

The spelling of 111220011011 in words is "one hundred eleven billion, two hundred twenty million, eleven thousand, eleven".