11112221221011 has 96 divisors (see below), whose sum is σ = 16638139552320. Its totient is φ = 7144154836992.

The previous prime is 11112221221009. The next prime is 11112221221033. The reversal of 11112221221011 is 11012212221111.

It is a happy number.

11112221221011 is a `hidden beast` number, since 111 + 122 + 212 + 210 + 11 = 666.

It is not a de Polignac number, because 11112221221011 - 2¹ = 11112221221009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11112221221081) 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 95 ways as a sum of consecutive naturals, for example, 1697296440 + ... + 1697302986.

It is an arithmetic number, because the mean of its divisors is an integer number (173313953670).

Almost surely, 2^{11112221221011} is an apocalyptic number.

11112221221011 is a deficient number, since it is larger than the sum of its proper divisors (5525918331309).

11112221221011 is a wasteful number, since it uses less digits than its factorization.

11112221221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7045 (or 7042 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11112221221011 its reverse (11012212221111), we get a palindrome (22124433442122).

The spelling of 11112221221011 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, eleven".