23111221110 has 64 divisors (see below), whose sum is σ = 56585725632. Its totient is φ = 6039760896.

The previous prime is 23111221087. The next prime is 23111221141. The reversal of 23111221110 is 1112211132.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 23111221110.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310222 + ... + 377438.

It is an arithmetic number, because the mean of its divisors is an integer number (884151963).

Almost surely, 2^23111221110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23111221110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28292862816).

23111221110 is an abundant number, since it is smaller than the sum of its proper divisors (33474504522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23111221110 is a wasteful number, since it uses less digits than its factorization.

23111221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67457.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 23111221110 its reverse (1112211132), we get a palindrome (24223432242).

The spelling of 23111221110 in words is "twenty-three billion, one hundred eleven million, two hundred twenty-one thousand, one hundred ten".