111221113 has 4 divisors (see below), whose sum is σ = 111842640. Its totient is φ = 110599588.

The previous prime is 111221101. The next prime is 111221141. The reversal of 111221113 is 311122111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111221113 - 2¹⁷ = 111090041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111221093 and 111221102.

It is not an unprimeable number, because it can be changed into a prime (111221153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310495 + ... + 310852.

It is an arithmetic number, because the mean of its divisors is an integer number (27960660).

Almost surely, 2^111221113 is an apocalyptic number.

It is an amenable number.

111221113 is a deficient number, since it is larger than the sum of its proper divisors (621527).

111221113 is an equidigital number, since it uses as much as digits as its factorization.

111221113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621526.

The product of its digits is 12, while the sum is 13.

The square root of 111221113 is about 10546.1420908311. The cubic root of 111221113 is about 480.9084546194.

Adding to 111221113 its reverse (311122111), we get a palindrome (422343224).

It can be divided in two parts, 11122111 and 3, that multiplied together give a palindrome (33366333).

The spelling of 111221113 in words is "one hundred eleven million, two hundred twenty-one thousand, one hundred thirteen".