12220136320 has 128 divisors (see below), whose sum is σ = 33428712960. Its totient is φ = 4184549376.

The previous prime is 12220136317. The next prime is 12220136363. The reversal of 12220136320 is 2363102221.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 12220136291 and 12220136300.

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, 5854317 + ... + 5856403.

It is an arithmetic number, because the mean of its divisors is an integer number (261161820).

Almost surely, 2^12220136320 is an apocalyptic number.

12220136320 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 12220136320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16714356480).

12220136320 is an abundant number, since it is smaller than the sum of its proper divisors (21208576640).

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

12220136320 is a wasteful number, since it uses less digits than its factorization.

12220136320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420 (or 3408 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 12220136320 its reverse (2363102221), we get a palindrome (14583238541).

The spelling of 12220136320 in words is "twelve billion, two hundred twenty million, one hundred thirty-six thousand, three hundred twenty".