23111213320 has 128 divisors (see below), whose sum is σ = 57480192000. Its totient is φ = 8310574080.

The previous prime is 23111213317. The next prime is 23111213351. The reversal of 23111213320 is 2331211132.

It is a super-2 number, since 2×23111213320² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3340665 + ... + 3347575.

It is an arithmetic number, because the mean of its divisors is an integer number (449064000).

Almost surely, 2^23111213320 is an apocalyptic number.

23111213320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23111213320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28740096000).

23111213320 is an abundant number, since it is smaller than the sum of its proper divisors (34368978680).

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

23111213320 is a wasteful number, since it uses less digits than its factorization.

23111213320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7103 (or 7099 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 23111213320 its reverse (2331211132), we get a palindrome (25442424452).

The spelling of 23111213320 in words is "twenty-three billion, one hundred eleven million, two hundred thirteen thousand, three hundred twenty".