23111002111 has 4 divisors (see below), whose sum is σ = 23227138000. Its totient is φ = 22994866224.

The previous prime is 23111002097. The next prime is 23111002141. The reversal of 23111002111 is 11120011132.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 23111002111 - 2¹¹ = 23111000063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23111002091 and 23111002100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23111002141) 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, 58067646 + ... + 58068043.

It is an arithmetic number, because the mean of its divisors is an integer number (5806784500).

Almost surely, 2^23111002111 is an apocalyptic number.

23111002111 is a deficient number, since it is larger than the sum of its proper divisors (116135889).

23111002111 is a wasteful number, since it uses less digits than its factorization.

23111002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116135888.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 23111002111 its reverse (11120011132), we get a palindrome (34231013243).

The spelling of 23111002111 in words is "twenty-three billion, one hundred eleven million, two thousand, one hundred eleven".