2220112101221 has 24 divisors (see below), whose sum is σ = 2611979472960. Its totient is φ = 1881296273472.

The previous prime is 2220112101217. The next prime is 2220112101223. The reversal of 2220112101221 is 1221012110222.

It is not a de Polignac number, because 2220112101221 - 2² = 2220112101217 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 2220112101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220112101223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33140666 + ... + 33207588.

It is an arithmetic number, because the mean of its divisors is an integer number (108832478040).

Almost surely, 2^{2220112101221} is an apocalyptic number.

It is an amenable number.

2220112101221 is a deficient number, since it is larger than the sum of its proper divisors (391867371739).

2220112101221 is an equidigital number, since it uses as much as digits as its factorization.

2220112101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74633 (or 74626 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2220112101221 its reverse (1221012110222), we get a palindrome (3441124211443).

Subtracting from 2220112101221 its reverse (1221012110222), we obtain a palindrome (999099990999).

It can be divided in two parts, 222011 and 2101221, that added together give a palindrome (2323232).

The spelling of 2220112101221 in words is "two trillion, two hundred twenty billion, one hundred twelve million, one hundred one thousand, two hundred twenty-one".