22123131111 has 12 divisors (see below), whose sum is σ = 31957946280. Its totient is φ = 14747686800.

The previous prime is 22123131109. The next prime is 22123131119. The reversal of 22123131111 is 11113132122.

It is not a de Polignac number, because 22123131111 - 2¹ = 22123131109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22123131119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54520 + ... + 217298.

It is an arithmetic number, because the mean of its divisors is an integer number (2663162190).

Almost surely, 2^22123131111 is an apocalyptic number.

22123131111 is a deficient number, since it is larger than the sum of its proper divisors (9834815169).

22123131111 is a wasteful number, since it uses less digits than its factorization.

22123131111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177886 (or 177883 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 22123131111 its reverse (11113132122), we get a palindrome (33236263233).

The spelling of 22123131111 in words is "twenty-two billion, one hundred twenty-three million, one hundred thirty-one thousand, one hundred eleven".