12222021120 has 160 divisors (see below), whose sum is σ = 39513497760. Its totient is φ = 3222405120.

The previous prime is 12222021067. The next prime is 12222021137. The reversal of 12222021120 is 2112022221.

It is a tau number, because it is divible by the number of its divisors (160).

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 12222021120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674580 + ... + 692460.

It is an arithmetic number, because the mean of its divisors is an integer number (246959361).

Almost surely, 2^12222021120 is an apocalyptic number.

12222021120 is a gapful number since it is divisible by the number (10) 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 12222021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19756748880).

12222021120 is an abundant number, since it is smaller than the sum of its proper divisors (27291476640).

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

12222021120 is an equidigital number, since it uses as much as digits as its factorization.

12222021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17996 (or 17980 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12222021120 its reverse (2112022221), we get a palindrome (14334043341).

The spelling of 12222021120 in words is "twelve billion, two hundred twenty-two million, twenty-one thousand, one hundred twenty".