12002021121220 has 24 divisors (see below), whose sum is σ = 27143032382424. Its totient is φ = 4431515490816.

The previous prime is 12002021121169. The next prime is 12002021121221. The reversal of 12002021121220 is 2212112020021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1088195303556 + 10913825817664 = 1043166^2 + 3303608^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12002021121194 and 12002021121203.

It is not an unprimeable number, because it can be changed into a prime (12002021121221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23080809589 + ... + 23080810108.

It is an arithmetic number, because the mean of its divisors is an integer number (1130959682601).

Almost surely, 2^{12002021121220} is an apocalyptic number.

12002021121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12002021121220 is an abundant number, since it is smaller than the sum of its proper divisors (15141011261204).

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

12002021121220 is a wasteful number, since it uses less digits than its factorization.

12002021121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46161619719 (or 46161619717 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12002021121220 its reverse (2212112020021), we get a palindrome (14214133141241).

The spelling of 12002021121220 in words is "twelve trillion, two billion, twenty-one million, one hundred twenty-one thousand, two hundred twenty".