12120211320 has 128 divisors (see below), whose sum is σ = 41591232000. Its totient is φ = 2767919616.

The previous prime is 12120211277. The next prime is 12120211331. The reversal of 12120211320 is 2311202121.

It is a super-2 number, since 2×12120211320² (a number of 21 digits) contains 22 as substring.

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 12120211320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1067031 + ... + 1078329.

It is an arithmetic number, because the mean of its divisors is an integer number (324931500).

Almost surely, 2^12120211320 is an apocalyptic number.

12120211320 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 12120211320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20795616000).

12120211320 is an abundant number, since it is smaller than the sum of its proper divisors (29471020680).

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

12120211320 is a wasteful number, since it uses less digits than its factorization.

12120211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12597 (or 12593 counting only the distinct ones).

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

Adding to 12120211320 its reverse (2311202121), we get a palindrome (14431413441).

The spelling of 12120211320 in words is "twelve billion, one hundred twenty million, two hundred eleven thousand, three hundred twenty".