2220111021 has 4 divisors (see below), whose sum is σ = 2960148032. Its totient is φ = 1480074012.

The previous prime is 2220111017. The next prime is 2220111053. The reversal of 2220111021 is 1201110222.

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 not a de Polignac number, because 2220111021 - 2² = 2220111017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220110988 and 2220111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220111121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370018501 + ... + 370018506.

It is an arithmetic number, because the mean of its divisors is an integer number (740037008).

Almost surely, 2^2220111021 is an apocalyptic number.

It is an amenable number.

2220111021 is a deficient number, since it is larger than the sum of its proper divisors (740037011).

2220111021 is an equidigital number, since it uses as much as digits as its factorization.

2220111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740037010.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2220111021 is about 47118.0540875788. The cubic root of 2220111021 is about 1304.5424957838.

Adding to 2220111021 its reverse (1201110222), we get a palindrome (3421221243).

The spelling of 2220111021 in words is "two billion, two hundred twenty million, one hundred eleven thousand, twenty-one".