22131001320 has 128 divisors (see below), whose sum is σ = 68287121280. Its totient is φ = 5734400000.

The previous prime is 22131001313. The next prime is 22131001337. The reversal of 22131001320 is 2310013122.

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 22131001320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1225960 + ... + 1243880.

It is an arithmetic number, because the mean of its divisors is an integer number (533493135).

Almost surely, 2^22131001320 is an apocalyptic number.

22131001320 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 22131001320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34143560640).

22131001320 is an abundant number, since it is smaller than the sum of its proper divisors (46156119960).

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

22131001320 is a wasteful number, since it uses less digits than its factorization.

22131001320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18227 (or 18223 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 22131001320 its reverse (2310013122), we get a palindrome (24441014442).

The spelling of 22131001320 in words is "twenty-two billion, one hundred thirty-one million, one thousand, three hundred twenty".