111220110201221 has 16 divisors (see below), whose sum is σ = 127484715559680. Its totient is φ = 95049925044480.

The previous prime is 111220110201203. The next prime is 111220110201227. The reversal of 111220110201221 is 122102011022111.

It is a de Polignac number, because none of the positive numbers 2^k-111220110201221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111220110201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220110201227) 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, 14107220 + ... + 20529341.

It is an arithmetic number, because the mean of its divisors is an integer number (7967794722480).

Almost surely, 2^{111220110201221} is an apocalyptic number.

It is an amenable number.

111220110201221 is a deficient number, since it is larger than the sum of its proper divisors (16264605358459).

111220110201221 is an equidigital number, since it uses as much as digits as its factorization.

111220110201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34637924.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111220110201221 its reverse (122102011022111), we get a palindrome (233322121223332).

The spelling of 111220110201221 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred ten million, two hundred one thousand, two hundred twenty-one".