111221122011 has 32 divisors (see below), whose sum is σ = 155344670208. Its totient is φ = 70648005120.

The previous prime is 111221122009. The next prime is 111221122037. The reversal of 111221122011 is 110221122111.

It is a happy number.

It is not a de Polignac number, because 111221122011 - 2¹ = 111221122009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111221127011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44900305 + ... + 44902781.

It is an arithmetic number, because the mean of its divisors is an integer number (4854520944).

Almost surely, 2^111221122011 is an apocalyptic number.

111221122011 is a deficient number, since it is larger than the sum of its proper divisors (44123548197).

111221122011 is a wasteful number, since it uses less digits than its factorization.

111221122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4771.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111221122011 its reverse (110221122111), we get a palindrome (221442244122).

The spelling of 111221122011 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred twenty-two thousand, eleven".