111013311221 has 4 divisors (see below), whose sum is σ = 111014231244. Its totient is φ = 111012391200.

The previous prime is 111013311163. The next prime is 111013311223. The reversal of 111013311221 is 122113310111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 47332788721 + 63680522500 = 217561^2 + 252350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111013311221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111013311221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111013311223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245750 + ... + 531431.

It is an arithmetic number, because the mean of its divisors is an integer number (27753557811).

Almost surely, 2^111013311221 is an apocalyptic number.

It is an amenable number.

111013311221 is a deficient number, since it is larger than the sum of its proper divisors (920023).

111013311221 is an equidigital number, since it uses as much as digits as its factorization.

111013311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920022.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 111013311221 its reverse (122113310111), we get a palindrome (233126621332).

The spelling of 111013311221 in words is "one hundred eleven billion, thirteen million, three hundred eleven thousand, two hundred twenty-one".