12021122320 has 40 divisors (see below), whose sum is σ = 28543780224. Its totient is φ = 4706140032.

The previous prime is 12021122299. The next prime is 12021122327. The reversal of 12021122320 is 2322112021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 12021122294 and 12021122303.

It is not an unprimeable number, because it can be changed into a prime (12021122327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1594794 + ... + 1602313.

Almost surely, 2^12021122320 is an apocalyptic number.

12021122320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021122320 is an abundant number, since it is smaller than the sum of its proper divisors (16522657904).

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

12021122320 is a wasteful number, since it uses less digits than its factorization.

12021122320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3197167 (or 3197161 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12021122320 its reverse (2322112021), we get a palindrome (14343234341).

The spelling of 12021122320 in words is "twelve billion, twenty-one million, one hundred twenty-two thousand, three hundred twenty".