22221233213 has 4 divisors (see below), whose sum is σ = 22221543900. Its totient is φ = 22220922528.

The previous prime is 22221233201. The next prime is 22221233261. The reversal of 22221233213 is 31233212222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 22005348964 + 215884249 = 148342^2 + 14693^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221233213 - 2⁶ = 22221233149 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 (22221233113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12113 + ... + 211161.

It is an arithmetic number, because the mean of its divisors is an integer number (5555385975).

Almost surely, 2^22221233213 is an apocalyptic number.

It is an amenable number.

22221233213 is a deficient number, since it is larger than the sum of its proper divisors (310687).

22221233213 is a wasteful number, since it uses less digits than its factorization.

22221233213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310686.

The product of its digits is 1728, while the sum is 23.

Adding to 22221233213 its reverse (31233212222), we get a palindrome (53454445435).

The spelling of 22221233213 in words is "twenty-two billion, two hundred twenty-one million, two hundred thirty-three thousand, two hundred thirteen".