23221111320 has 128 divisors (see below), whose sum is σ = 84440448000. Its totient is φ = 5629357440.

The previous prime is 23221111313. The next prime is 23221111339. The reversal of 23221111320 is 2311112232.

23221111320 is a `hidden beast` number, since 2 + 322 + 11 + 11 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23221111293 and 23221111302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 965440 + ... + 989199.

It is an arithmetic number, because the mean of its divisors is an integer number (659691000).

Almost surely, 2^23221111320 is an apocalyptic number.

23221111320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23221111320 is an abundant number, since it is smaller than the sum of its proper divisors (61219336680).

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

23221111320 is a wasteful number, since it uses less digits than its factorization.

23221111320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954670 (or 1954660 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 23221111320 its reverse (2311112232), we get a palindrome (25532223552).

The spelling of 23221111320 in words is "twenty-three billion, two hundred twenty-one million, one hundred eleven thousand, three hundred twenty".