111222022211 has 4 divisors (see below), whose sum is σ = 111888022512. Its totient is φ = 110556021912.

The previous prime is 111222022199. The next prime is 111222022229. The reversal of 111222022211 is 112220222111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111222022211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111222022211.

It is not an unprimeable number, because it can be changed into a prime (111222022411) 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 3 ways as a sum of consecutive naturals, for example, 332999900 + ... + 333000233.

It is an arithmetic number, because the mean of its divisors is an integer number (27972005628).

Almost surely, 2^111222022211 is an apocalyptic number.

111222022211 is a deficient number, since it is larger than the sum of its proper divisors (666000301).

111222022211 is an equidigital number, since it uses as much as digits as its factorization.

111222022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666000300.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111222022211 its reverse (112220222111), we get a palindrome (223442244322).

The spelling of 111222022211 in words is "one hundred eleven billion, two hundred twenty-two million, twenty-two thousand, two hundred eleven".