2221123 has 4 divisors (see below), whose sum is σ = 2226240. Its totient is φ = 2216008.

The previous prime is 2221111. The next prime is 2221127. The reversal of 2221123 is 3211222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221123 is a prime.

It is a super-2 number, since 2×2221123² = 9866774762258, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221127) 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, 1840 + ... + 2797.

It is an arithmetic number, because the mean of its divisors is an integer number (556560).

2^2221123 is an apocalyptic number.

2221123 is a deficient number, since it is larger than the sum of its proper divisors (5117).

2221123 is an equidigital number, since it uses as much as digits as its factorization.

2221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5116.

The product of its digits is 48, while the sum is 13.

The square root of 2221123 is about 1490.3432490537. The cubic root of 2221123 is about 130.4740679427.

Adding to 2221123 its reverse (3211222), we get a palindrome (5432345).

Subtracting 2221123 from its reverse (3211222), we obtain a palindrome (990099).

The spelling of 2221123 in words is "two million, two hundred twenty-one thousand, one hundred twenty-three".