22531112111 has 4 divisors (see below), whose sum is σ = 22531505592. Its totient is φ = 22530718632.

The previous prime is 22531112099. The next prime is 22531112117. The reversal of 22531112111 is 11121113522.

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-22531112111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22531112117) 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, 92405 + ... + 231518.

It is an arithmetic number, because the mean of its divisors is an integer number (5632876398).

Almost surely, 2^22531112111 is an apocalyptic number.

22531112111 is a deficient number, since it is larger than the sum of its proper divisors (393481).

22531112111 is an equidigital number, since it uses as much as digits as its factorization.

22531112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393480.

The product of its digits is 120, while the sum is 20.

Adding to 22531112111 its reverse (11121113522), we get a palindrome (33652225633).

The spelling of 22531112111 in words is "twenty-two billion, five hundred thirty-one million, one hundred twelve thousand, one hundred eleven".