111100221122011 has 4 divisors (see below), whose sum is σ = 121200241224024. Its totient is φ = 101000201020000.

The previous prime is 111100221121949. The next prime is 111100221122029. The reversal of 111100221122011 is 110221122001111.

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 111100221122011 - 2²¹ = 111100219024859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111100221122711) 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, 5050010050990 + ... + 5050010051011.

It is an arithmetic number, because the mean of its divisors is an integer number (30300060306006).

Almost surely, 2^{111100221122011} is an apocalyptic number.

111100221122011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111100221122011 is a deficient number, since it is larger than the sum of its proper divisors (10100020102013).

111100221122011 is a wasteful number, since it uses less digits than its factorization.

111100221122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100020102012.

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

Adding to 111100221122011 its reverse (110221122001111), we get a palindrome (221321343123122).

The spelling of 111100221122011 in words is "one hundred eleven trillion, one hundred billion, two hundred twenty-one million, one hundred twenty-two thousand, eleven".