111111100221211 has 4 divisors (see below), whose sum is σ = 112189848767152. Its totient is φ = 110032351675272.

The previous prime is 111111100221193. The next prime is 111111100221217. The reversal of 111111100221211 is 112122001111111.

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 111111100221211 - 2⁹ = 111111100220699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111111100221217) 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, 539374272816 + ... + 539374273021.

It is an arithmetic number, because the mean of its divisors is an integer number (28047462191788).

Almost surely, 2^{111111100221211} is an apocalyptic number.

111111100221211 is a deficient number, since it is larger than the sum of its proper divisors (1078748545941).

111111100221211 is a wasteful number, since it uses less digits than its factorization.

111111100221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078748545940.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 111111100221211 its reverse (112122001111111), we get a palindrome (223233101332322).

The spelling of 111111100221211 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred million, two hundred twenty-one thousand, two hundred eleven".