22231021211 has 4 divisors (see below), whose sum is σ = 25406881392. Its totient is φ = 19055161032.

The previous prime is 22231021187. The next prime is 22231021217. The reversal of 22231021211 is 11212013222.

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 22231021211 - 2⁶ = 22231021147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22231021211.

It is not an unprimeable number, because it can be changed into a prime (22231021217) 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, 1587930080 + ... + 1587930093.

It is an arithmetic number, because the mean of its divisors is an integer number (6351720348).

Almost surely, 2^22231021211 is an apocalyptic number.

22231021211 is a deficient number, since it is larger than the sum of its proper divisors (3175860181).

22231021211 is an equidigital number, since it uses as much as digits as its factorization.

22231021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175860180.

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

Adding to 22231021211 its reverse (11212013222), we get a palindrome (33443034433).

The spelling of 22231021211 in words is "twenty-two billion, two hundred thirty-one million, twenty-one thousand, two hundred eleven".