2220111020221 has 4 divisors (see below), whose sum is σ = 2220403571100. Its totient is φ = 2219818469344.

The previous prime is 2220111020203. The next prime is 2220111020263. The reversal of 2220111020221 is 1220201110222.

It is a happy number.

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 880735325625 + 1339375694596 = 938475^2 + 1157314^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220111020221 - 2¹⁷ = 2220110889149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220111020195 and 2220111020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220112020221) 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, 146264056 + ... + 146279233.

It is an arithmetic number, because the mean of its divisors is an integer number (555100892775).

Almost surely, 2^{2220111020221} is an apocalyptic number.

It is an amenable number.

2220111020221 is a deficient number, since it is larger than the sum of its proper divisors (292550879).

2220111020221 is an equidigital number, since it uses as much as digits as its factorization.

2220111020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292550878.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2220111020221 its reverse (1220201110222), we get a palindrome (3440312130443).

Subtracting from 2220111020221 its reverse (1220201110222), we obtain a palindrome (999909909999).

The spelling of 2220111020221 in words is "two trillion, two hundred twenty billion, one hundred eleven million, twenty thousand, two hundred twenty-one".