111221110111101 has 16 divisors (see below), whose sum is σ = 150330962758464. Its totient is φ = 73129395798144.

The previous prime is 111221110111091. The next prime is 111221110111129. The reversal of 111221110111101 is 101111011122111.

It is a happy number.

It is not a de Polignac number, because 111221110111101 - 2¹⁵ = 111221110078333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221110119101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 947391 + ... + 14944556.

It is an arithmetic number, because the mean of its divisors is an integer number (9395685172404).

Almost surely, 2^{111221110111101} is an apocalyptic number.

It is an amenable number.

111221110111101 is a deficient number, since it is larger than the sum of its proper divisors (39109852647363).

111221110111101 is a wasteful number, since it uses less digits than its factorization.

111221110111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15923980.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 111221110111101 its reverse (101111011122111), we get a palindrome (212332121233212).

The spelling of 111221110111101 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred ten million, one hundred eleven thousand, one hundred one".