12001201021220 has 24 divisors (see below), whose sum is σ = 25202587818744. Its totient is φ = 4800467899136.

The previous prime is 12001201021163. The next prime is 12001201021291. The reversal of 12001201021220 is 2212010210021.

12001201021220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2475990366784 + 9525210654436 = 1573528^2 + 3086294^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12001201021195 and 12001201021204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13075694 + ... + 13963386.

It is an arithmetic number, because the mean of its divisors is an integer number (1050107825781).

Almost surely, 2^{12001201021220} is an apocalyptic number.

12001201021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001201021220 is an abundant number, since it is smaller than the sum of its proper divisors (13201386797524).

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

12001201021220 is a wasteful number, since it uses less digits than its factorization.

12001201021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563679 (or 1563677 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12001201021220 its reverse (2212010210021), we get a palindrome (14213211231241).

The spelling of 12001201021220 in words is "twelve trillion, one billion, two hundred one million, twenty-one thousand, two hundred twenty".