220111111111 has 4 divisors (see below), whose sum is σ = 220157660800. Its totient is φ = 220064561424.

The previous prime is 220111111109. The next prime is 220111111117. The reversal of 220111111111 is 111111111022.

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 220111111111 - 2¹ = 220111111109 is a prime.

It is a Duffinian number.

220111111111 is a modest number, since divided by 1111111 gives 22011 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 220111111091 and 220111111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220111111117) 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, 23267751 + ... + 23277208.

It is an arithmetic number, because the mean of its divisors is an integer number (55039415200).

Almost surely, 2^220111111111 is an apocalyptic number.

220111111111 is a deficient number, since it is larger than the sum of its proper divisors (46549689).

220111111111 is an equidigital number, since it uses as much as digits as its factorization.

220111111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46549688.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 220111111111 its reverse (111111111022), we get a palindrome (331222222133).

The spelling of 220111111111 in words is "two hundred twenty billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".