22111111321 has 4 divisors (see below), whose sum is σ = 23811966052. Its totient is φ = 20410256592.

The previous prime is 22111111247. The next prime is 22111111343. The reversal of 22111111321 is 12311111122.

It is a happy number.

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 1850720400 + 20260390921 = 43020^2 + 142339^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111111321 - 2¹⁵ = 22111078553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111111295 and 22111111304.

It is not an unprimeable number, because it can be changed into a prime (22111111361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850427346 + ... + 850427371.

It is an arithmetic number, because the mean of its divisors is an integer number (5952991513).

Almost surely, 2^22111111321 is an apocalyptic number.

It is an amenable number.

22111111321 is a deficient number, since it is larger than the sum of its proper divisors (1700854731).

22111111321 is a wasteful number, since it uses less digits than its factorization.

22111111321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700854730.

The product of its digits is 24, while the sum is 16.

Adding to 22111111321 its reverse (12311111122), we get a palindrome (34422222443).

The spelling of 22111111321 in words is "twenty-two billion, one hundred eleven million, one hundred eleven thousand, three hundred twenty-one".