22111321211 has 4 divisors (see below), whose sum is σ = 25270081392. Its totient is φ = 18952561032.

The previous prime is 22111321171. The next prime is 22111321229. The reversal of 22111321211 is 11212311122.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22111321211 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 22111321211.

It is not an unprimeable number, because it can be changed into a prime (22111321291) 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, 1579380080 + ... + 1579380093.

It is an arithmetic number, because the mean of its divisors is an integer number (6317520348).

Almost surely, 2^22111321211 is an apocalyptic number.

22111321211 is a deficient number, since it is larger than the sum of its proper divisors (3158760181).

22111321211 is an equidigital number, since it uses as much as digits as its factorization.

22111321211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158760180.

The product of its digits is 48, while the sum is 17.

Adding to 22111321211 its reverse (11212311122), we get a palindrome (33323632333).

The spelling of 22111321211 in words is "twenty-two billion, one hundred eleven million, three hundred twenty-one thousand, two hundred eleven".