111220122212011 has 4 divisors (see below), whose sum is σ = 111221940992152. Its totient is φ = 111218303431872.

The previous prime is 111220122211993. The next prime is 111220122212071. The reversal of 111220122212011 is 110212221022111.

It is a happy number.

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 111220122212011 - 2¹⁷ = 111220122080939 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 111220122212011.

It is not an unprimeable number, because it can be changed into a prime (111220122212071) 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, 909298341 + ... + 909420646.

It is an arithmetic number, because the mean of its divisors is an integer number (27805485248038).

Almost surely, 2^{111220122212011} is an apocalyptic number.

111220122212011 is a deficient number, since it is larger than the sum of its proper divisors (1818780141).

111220122212011 is an equidigital number, since it uses as much as digits as its factorization.

111220122212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818780140.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111220122212011 its reverse (110212221022111), we get a palindrome (221432343234122).

The spelling of 111220122212011 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred twenty-two million, two hundred twelve thousand, eleven".