2221113421 has 4 divisors (see below), whose sum is σ = 2221555644. Its totient is φ = 2220671200.

The previous prime is 2221113413. The next prime is 2221113431. The reversal of 2221113421 is 1243111222.

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 1122920100 + 1098193321 = 33510^2 + 33139^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221113421 - 2³ = 2221113413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221113431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213490 + ... + 223651.

It is an arithmetic number, because the mean of its divisors is an integer number (555388911).

Almost surely, 2^2221113421 is an apocalyptic number.

It is an amenable number.

2221113421 is a deficient number, since it is larger than the sum of its proper divisors (442223).

2221113421 is an equidigital number, since it uses as much as digits as its factorization.

2221113421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442222.

The product of its digits is 192, while the sum is 19.

The square root of 2221113421 is about 47128.6899987683. The cubic root of 2221113421 is about 1304.7388037801.

Adding to 2221113421 its reverse (1243111222), we get a palindrome (3464224643).

The spelling of 2221113421 in words is "two billion, two hundred twenty-one million, one hundred thirteen thousand, four hundred twenty-one".