2220221111 has 4 divisors (see below), whose sum is σ = 2225758224. Its totient is φ = 2214684000.

The previous prime is 2220221099. The next prime is 2220221123. The reversal of 2220221111 is 1111220222.

2220221111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2220221099) and next prime (2220221123).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2220221111 is a prime.

It is a super-4 number, since 4×2220221111⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220229111) 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, 2767955 + ... + 2768756.

It is an arithmetic number, because the mean of its divisors is an integer number (556439556).

Almost surely, 2^2220221111 is an apocalyptic number.

2220221111 is a deficient number, since it is larger than the sum of its proper divisors (5537113).

2220221111 is an equidigital number, since it uses as much as digits as its factorization.

2220221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5537112.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2220221111 is about 47119.2223089473. Note that the first 3 decimals coincide. The cubic root of 2220221111 is about 1304.5640584757.

Adding to 2220221111 its reverse (1111220222), we get a palindrome (3331441333).

The spelling of 2220221111 in words is "two billion, two hundred twenty million, two hundred twenty-one thousand, one hundred eleven".