111333113333221 has 4 divisors (see below), whose sum is σ = 119897198974252. Its totient is φ = 102769027692192.

The previous prime is 111333113333219. The next prime is 111333113333303. The reversal of 111333113333221 is 122333311333111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11179754580996 + 100153358752225 = 3343614^2 + 10007665^2 .

It is a cyclic number.

It is not a de Polignac number, because 111333113333221 - 2¹ = 111333113333219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111333113303221) 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, 4282042820496 + ... + 4282042820521.

It is an arithmetic number, because the mean of its divisors is an integer number (29974299743563).

Almost surely, 2^{111333113333221} is an apocalyptic number.

It is an amenable number.

111333113333221 is a deficient number, since it is larger than the sum of its proper divisors (8564085641031).

111333113333221 is an equidigital number, since it uses as much as digits as its factorization.

111333113333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8564085641030.

The product of its digits is 8748, while the sum is 31.

Adding to 111333113333221 its reverse (122333311333111), we get a palindrome (233666424666332).

The spelling of 111333113333221 in words is "one hundred eleven trillion, three hundred thirty-three billion, one hundred thirteen million, three hundred thirty-three thousand, two hundred twenty-one".