2211221123 has 4 divisors (see below), whose sum is σ = 2212281720. Its totient is φ = 2210160528.

The previous prime is 2211221113. The next prime is 2211221141. The reversal of 2211221123 is 3211221122.

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

It is a cyclic number.

It is not a de Polignac number, because 2211221123 - 2⁴ = 2211221107 is a prime.

It is a super-2 number, since 2×2211221123² = 9778997709602762258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211221113) 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, 527165 + ... + 531342.

It is an arithmetic number, because the mean of its divisors is an integer number (553070430).

Almost surely, 2^2211221123 is an apocalyptic number.

2211221123 is a deficient number, since it is larger than the sum of its proper divisors (1060597).

2211221123 is a wasteful number, since it uses less digits than its factorization.

2211221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060596.

The product of its digits is 96, while the sum is 17.

The square root of 2211221123 is about 47023.6230314084. The cubic root of 2211221123 is about 1302.7989247637.

Adding to 2211221123 its reverse (3211221122), we get a palindrome (5422442245).

Subtracting 2211221123 from its reverse (3211221122), we obtain a palindrome (999999999).

The spelling of 2211221123 in words is "two billion, two hundred eleven million, two hundred twenty-one thousand, one hundred twenty-three".