22123431211 has 4 divisors (see below), whose sum is σ = 25283921392. Its totient is φ = 18962941032.

The previous prime is 22123431167. The next prime is 22123431217. The reversal of 22123431211 is 11213432122.

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

It is not a de Polignac number, because 22123431211 - 2¹³ = 22123423019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22123431217) 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, 1580245080 + ... + 1580245093.

It is an arithmetic number, because the mean of its divisors is an integer number (6320980348).

Almost surely, 2^22123431211 is an apocalyptic number.

22123431211 is a deficient number, since it is larger than the sum of its proper divisors (3160490181).

22123431211 is an equidigital number, since it uses as much as digits as its factorization.

22123431211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160490180.

The product of its digits is 576, while the sum is 22.

Adding to 22123431211 its reverse (11213432122), we get a palindrome (33336863333).

The spelling of 22123431211 in words is "twenty-two billion, one hundred twenty-three million, four hundred thirty-one thousand, two hundred eleven".