221122112011 has 4 divisors (see below), whose sum is σ = 221982509592. Its totient is φ = 220261714432.

The previous prime is 221122112009. The next prime is 221122112021. The reversal of 221122112011 is 110211221122.

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 221122112011 - 2¹ = 221122112009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221122112021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430198405 + ... + 430198918.

It is an arithmetic number, because the mean of its divisors is an integer number (55495627398).

Almost surely, 2^221122112011 is an apocalyptic number.

221122112011 is a deficient number, since it is larger than the sum of its proper divisors (860397581).

221122112011 is an equidigital number, since it uses as much as digits as its factorization.

221122112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860397580.

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

Adding to 221122112011 its reverse (110211221122), we get a palindrome (331333333133).

The spelling of 221122112011 in words is "two hundred twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, eleven".