12021122011220 has 48 divisors (see below), whose sum is σ = 28857777596928. Its totient is φ = 4120515436800.

The previous prime is 12021122011219. The next prime is 12021122011229. The reversal of 12021122011220 is 2211022112021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021122011229) 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, 9970556 + ... + 11110995.

It is an arithmetic number, because the mean of its divisors is an integer number (601203699936).

Almost surely, 2^{12021122011220} is an apocalyptic number.

12021122011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021122011220 is an abundant number, since it is smaller than the sum of its proper divisors (16836655585708).

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

12021122011220 is a wasteful number, since it uses less digits than its factorization.

12021122011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21085640 (or 21085638 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021122011220 its reverse (2211022112021), we get a palindrome (14232144123241).

The spelling of 12021122011220 in words is "twelve trillion, twenty-one billion, one hundred twenty-two million, eleven thousand, two hundred twenty".