12021320120 has 64 divisors (see below), whose sum is σ = 28883347200. Its totient is φ = 4492938240.

The previous prime is 12021320107. The next prime is 12021320123. The reversal of 12021320120 is 2102312021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12021320095 and 12021320104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021320123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131189 + ... + 203108.

It is an arithmetic number, because the mean of its divisors is an integer number (451302300).

Almost surely, 2^12021320120 is an apocalyptic number.

12021320120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021320120 is an abundant number, since it is smaller than the sum of its proper divisors (16862027080).

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

12021320120 is a wasteful number, since it uses less digits than its factorization.

12021320120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334368 (or 334364 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12021320120 its reverse (2102312021), we get a palindrome (14123632141).

The spelling of 12021320120 in words is "twelve billion, twenty-one million, three hundred twenty thousand, one hundred twenty".