111011201112221 has 4 divisors (see below), whose sum is σ = 114592207599744. Its totient is φ = 107430194624700.

The previous prime is 111011201112209. The next prime is 111011201112233. The reversal of 111011201112221 is 122211102110111.

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 an interprime number because it is at equal distance from previous prime (111011201112209) and next prime (111011201112233).

It is a cyclic number.

It is not a de Polignac number, because 111011201112221 - 2¹⁰ = 111011201111197 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 111011201112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111011201112241) 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, 1790503243715 + ... + 1790503243776.

It is an arithmetic number, because the mean of its divisors is an integer number (28648051899936).

Almost surely, 2^{111011201112221} is an apocalyptic number.

It is an amenable number.

111011201112221 is a deficient number, since it is larger than the sum of its proper divisors (3581006487523).

111011201112221 is an equidigital number, since it uses as much as digits as its factorization.

111011201112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581006487522.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111011201112221 its reverse (122211102110111), we get a palindrome (233222303222332).

The spelling of 111011201112221 in words is "one hundred eleven trillion, eleven billion, two hundred one million, one hundred twelve thousand, two hundred twenty-one".