12021183720 has 1152 divisors, whose sum is σ = 53778816000. Its totient is φ = 2299207680.

The previous prime is 12021183719. The next prime is 12021183731. The reversal of 12021183720 is 2738112021.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 135069436 + ... + 135069524.

It is an arithmetic number, because the mean of its divisors is an integer number (46683000).

Almost surely, 2^12021183720 is an apocalyptic number.

12021183720 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 12021183720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26889408000).

12021183720 is an abundant number, since it is smaller than the sum of its proper divisors (41757632280).

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

12021183720 is a wasteful number, since it uses less digits than its factorization.

12021183720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

Adding to 12021183720 its reverse (2738112021), we get a palindrome (14759295741).

The spelling of 12021183720 in words is "twelve billion, twenty-one million, one hundred eighty-three thousand, seven hundred twenty".