111220212211 has 4 divisors (see below), whose sum is σ = 114807961024. Its totient is φ = 107632463400.

The previous prime is 111220212203. The next prime is 111220212221. The reversal of 111220212211 is 112212022111.

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 111220212211 - 2³ = 111220212203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111220212221) 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, 1793874360 + ... + 1793874421.

It is an arithmetic number, because the mean of its divisors is an integer number (28701990256).

Almost surely, 2^111220212211 is an apocalyptic number.

111220212211 is a deficient number, since it is larger than the sum of its proper divisors (3587748813).

111220212211 is an equidigital number, since it uses as much as digits as its factorization.

111220212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3587748812.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111220212211 its reverse (112212022111), we get a palindrome (223432234322).

The spelling of 111220212211 in words is "one hundred eleven billion, two hundred twenty million, two hundred twelve thousand, two hundred eleven".