111100221211 has 4 divisors (see below), whose sum is σ = 126971681392. Its totient is φ = 95228761032.

The previous prime is 111100221203. The next prime is 111100221251. The reversal of 111100221211 is 112122001111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112122001111 = 499 ⋅224693389.

It is a cyclic number.

It is not a de Polignac number, because 111100221211 - 2³ = 111100221203 is a prime.

It is a super-3 number, since 3×111100221211³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111100221191 and 111100221200.

It is not an unprimeable number, because it can be changed into a prime (111100221251) 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, 7935730080 + ... + 7935730093.

It is an arithmetic number, because the mean of its divisors is an integer number (31742920348).

Almost surely, 2^111100221211 is an apocalyptic number.

111100221211 is a deficient number, since it is larger than the sum of its proper divisors (15871460181).

111100221211 is an equidigital number, since it uses as much as digits as its factorization.

111100221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15871460180.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111100221211 its reverse (112122001111), we get a palindrome (223222222322).

The spelling of 111100221211 in words is "one hundred eleven billion, one hundred million, two hundred twenty-one thousand, two hundred eleven".