12021303120 has 160 divisors (see below), whose sum is σ = 38364544512. Its totient is φ = 3112452096.

The previous prime is 12021303113. The next prime is 12021303121. The reversal of 12021303120 is 2130312021.

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 12021303120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021303121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1228969 + ... + 1238711.

Almost surely, 2^12021303120 is an apocalyptic number.

12021303120 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 12021303120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19182272256).

12021303120 is an abundant number, since it is smaller than the sum of its proper divisors (26343241392).

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

12021303120 is a wasteful number, since it uses less digits than its factorization.

12021303120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9909 (or 9903 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12021303120 its reverse (2130312021), we get a palindrome (14151615141).

The spelling of 12021303120 in words is "twelve billion, twenty-one million, three hundred three thousand, one hundred twenty".