23112122111 has 12 divisors (see below), whose sum is σ = 25057743480. Its totient is φ = 21307834080.

The previous prime is 23112122107. The next prime is 23112122153. The reversal of 23112122111 is 11122121132.

It is a happy number.

It is not a de Polignac number, because 23112122111 - 2² = 23112122107 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 23112122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23112122161) 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, 52745 + ... + 221373.

It is an arithmetic number, because the mean of its divisors is an integer number (2088145290).

Almost surely, 2^23112122111 is an apocalyptic number.

23112122111 is a deficient number, since it is larger than the sum of its proper divisors (1945621369).

23112122111 is a wasteful number, since it uses less digits than its factorization.

23112122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169466 (or 169453 counting only the distinct ones).

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

Adding to 23112122111 its reverse (11122121132), we get a palindrome (34234243243).

The spelling of 23112122111 in words is "twenty-three billion, one hundred twelve million, one hundred twenty-two thousand, one hundred eleven".