12021122331220 has 12 divisors (see below), whose sum is σ = 25244356895604. Its totient is φ = 4808448932480.

The previous prime is 12021122331167. The next prime is 12021122331259. The reversal of 12021122331220 is 2213322112021.

It can be written as a sum of positive squares in 2 ways, for example, as 4671286851856 + 7349835479364 = 2161316^2 + 2711058^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12021122331191 and 12021122331200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300528058261 + ... + 300528058300.

It is an arithmetic number, because the mean of its divisors is an integer number (2103696407967).

Almost surely, 2^{12021122331220} is an apocalyptic number.

12021122331220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021122331220 is an abundant number, since it is smaller than the sum of its proper divisors (13223234564384).

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

12021122331220 is a wasteful number, since it uses less digits than its factorization.

12021122331220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601056116570 (or 601056116568 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 12021122331220 its reverse (2213322112021), we get a palindrome (14234444443241).

The spelling of 12021122331220 in words is "twelve trillion, twenty-one billion, one hundred twenty-two million, three hundred thirty-one thousand, two hundred twenty".