12221013120 has 64 divisors (see below), whose sum is σ = 38954485440. Its totient is φ = 3258936320.

The previous prime is 12221013113. The next prime is 12221013121. The reversal of 12221013120 is 2131012221.

It is a tau number, because it is divible by the number of its divisors (64).

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 12221013120.

It is not an unprimeable number, because it can be changed into a prime (12221013121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3180636 + ... + 3184475.

It is an arithmetic number, because the mean of its divisors is an integer number (608663835).

Almost surely, 2^12221013120 is an apocalyptic number.

12221013120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221013120 is an abundant number, since it is smaller than the sum of its proper divisors (26733472320).

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

12221013120 is an equidigital number, since it uses as much as digits as its factorization.

12221013120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6365133 (or 6365121 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12221013120 its reverse (2131012221), we get a palindrome (14352025341).

It can be divided in two parts, 1222101 and 3120, that added together give a palindrome (1225221).

The spelling of 12221013120 in words is "twelve billion, two hundred twenty-one million, thirteen thousand, one hundred twenty".